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Practice Reading: Fill in The Blanks (Drag & Drop)
ID: #48069
Air on Mars
Instructions
In the text below some words are missing. Drag words from the box below to the appropriate place in the text. To undo an answer choice, drag the word back to the box below the text.
* Drag the correct answer into all target fields
The rover analysed the air on Mars, and it found that the air contained another of the most basic organic molecules and a key of natural gas: methane. One of the characteristics of methane is that it only a few hundred years. This means that something, somewhere on Mars, is the supply. According to NASA, Mars thousands of tons of methane at a time.
replenishing
rejuvenating
emits
ingredient
concern
stains
survives
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