A.I. Explanation:

Question Focus: Components of the new gas sensor

Correct Answer: ceramic

Passage Reference: But Argonne's new sensor, made of ceramics and metals, is not affected by high temperatures. 'The materials in this sensor behave well through a wide range of temperatures

Why this is correct: The table asks about what the new sensor is made of. The passage clearly says it is made of ceramics and metals, so the first component is ceramic.

Common Mistake: Students sometimes write ceramics (plural), but the gap already shows singular grammar. This is a grammar fit trap.

Paraphrasing: Passage: 'made of ceramics and metals' = Table: 'Components'

Tips: When a list uses 'and', check how many items you need to fill.

Key Vocabulary:

• ceramic = heat-resistant material

Question Focus: Components of the new gas sensor

Correct Answer: metals

Passage Reference: But Argonne's new sensor, made of ceramics and metals, is not affected by high temperatures. 'The materials in this sensor behave well through a wide range of temperatures

Why this is correct: The passage states the sensor is made of ceramics and metals. This gap completes that exact phrase.

Common Mistake: Some students write metal, but the passage uses metals. You must copy the exact word. This is a synonym and form trap.

Paraphrasing: Passage: 'ceramics and metals' = Table: 'Components'

Tips: Always copy the exact form from the passage, including plural -s.

Key Vocabulary:

• metal = strong material

Question Focus: Temperature limit of conventional sensors

Correct Answer: above 150

Passage Reference: Conventional silicon sensors do not work well at temperatures above 150.

Why this is correct: The passage says conventional sensors do not work well at temperatures above 150. The table summarises this limit.

Common Mistake: Writing 150 degrees adds an extra word and changes the text. This is a word limit trap.

Paraphrasing: Passage: 'do not work well at temperatures above 150' = Table: 'Temperature at which they work well'

Tips: Numbers often need to be copied exactly, without adding units.

Key Vocabulary:

• conventional = traditional

Question Focus: Material of conventional sensors

Correct Answer: silicon

Passage Reference: Conventional silicon sensors do not work well at temperatures above 150.

Why this is correct: The passage directly names silicon as the material used in conventional sensors.

Common Mistake: Some students write ceramic, confusing new and old sensors. This is a context shift trap.

Paraphrasing: Passage: 'Conventional silicon sensors' = Table: 'Components'

Tips: Be careful to separate information about new devices and conventional ones.

Key Vocabulary:

• silicon = common electronic material

Question Focus: Use of conventional sensors

Correct Answer: measure oxygen

Passage Reference: today's typical sensors only measure oxygen.

Why this is correct: The passage explains that current sensors only measure oxygen, which limits their use.

Common Mistake: Writing monitor gases is too general and refers to the new sensor. This is a context shift trap.

Paraphrasing: Passage: 'only measure oxygen' = Table: 'Uses'

Tips: Look for words like 'only' that limit meaning.

Key Vocabulary:

• measure = check

Question Focus: Function of the new sensor

Correct Answer: detect gases

Passage Reference: The tiny sensor detects a variety of gases.

Why this is correct: The summary says the sensor can endure many conditions while it can detect gases. This comes directly from the passage.

Common Mistake: Students may write sense gases, but that is not the exact wording. This is a synonym trap.

Paraphrasing: Passage: 'detects a variety of gases' = Summary: 'detect gases'

Tips: Do not change verb form unless grammar requires it.

Key Vocabulary:

• detect = find

Question Focus: What does not affect the new sensor

Correct Answer: high temperatures

Passage Reference: is not affected by high temperatures.

Why this is correct: The passage clearly states the sensor is not affected by high temperatures, matching the summary.

Common Mistake: Writing heat is shorter but not exact. This is a synonym trap.

Paraphrasing: Passage: 'not affected by high temperatures' = Summary: 'while not affected by ___'

Tips: If the passage phrase fits the gap, use it exactly.

Key Vocabulary:

• affected = influenced

Question Focus: What reacts on the sensor

Correct Answer: gas

Passage Reference: Each gas reacts at a characteristic voltage

Why this is correct: The sentence begins with Each gas reacts, so the singular noun gas fits the gap.

Common Mistake: Using gases breaks the grammar. This is a grammar fit trap.

Paraphrasing: Passage: 'Each gas reacts' = Summary: 'As each ___ reacts'

Tips: Grammar words like 'each' and 'every' control singular or plural.

Key Vocabulary:

• react = change chemically

Question Focus: How gases are identified

Correct Answer: characteristic voltage

Passage Reference: Each gas reacts at a characteristic voltage

Why this is correct: The passage explains that every gas reacts at a characteristic voltage, which identifies it.

Common Mistake: Writing different voltage changes the meaning. This is a paraphrase trap.

Paraphrasing: Passage: 'reacts at a characteristic voltage' = Summary: 'reacts at a ___'

Tips: Scientific terms are often reused exactly in summaries.

Key Vocabulary:

• characteristic = unique

Question Focus: What indicates gas concentration

Correct Answer: the size

Passage Reference: and the size of the current spike indicates

Why this is correct: The passage says the size of the current spike shows information about the gas, so the size fits.

Common Mistake: Students sometimes write current spike, which misses the indicator. This is a partial truth trap.

Paraphrasing: Passage: 'the size of the current spike indicates' = Summary: '___ of which indicates'

Tips: Look carefully at what does the indicating, not what is being measured.

Key Vocabulary:

• spike = sudden increase

Question Focus: Limitation of conventional sensors

Correct Answer: measure oxygen

Passage Reference: today's typical sensors only measure oxygen.

Why this is correct: The passage contrasts new and old sensors, saying conventional ones only measure oxygen.

Common Mistake: Writing monitor gases reverses the meaning. This is a contradiction trap.

Paraphrasing: Passage: 'only measure oxygen' = Summary: 'used only to ___'

Tips: Contrast words like 'on the other hand' signal opposite information.

Key Vocabulary:

• oxygen = a gas we breathe

General Tips:

• Summary completion questions follow passage order. Use the previous answer to find the next.
• Always copy the exact word or phrase from the passage. Do not replace it with a synonym.
• Check grammar clues like 'each', 'a', or 'to' before the gap.
• Watch the word limit carefully. Extra words make the answer wrong.