if引导的条件状语从句 — 英语填空题
题目
用括号中所给动词的适当形式填空（每空一词）。If people ___ (can, not) find enough water on Mars, they will have to bring it from the Earth. If we work together, we ___ (make) life on Mars possible one day.
《Unit 4 Life on Mars》其他练习题
选择题
People use robots to study Mars. Choose the sentence with the same meaning. A. R…
选择题
In the future, humans may live on Mars. Because the gravity on Mars is much weak…
填空题
用所给动词的适当形式填空：More space stations ______ (build) on Mar…
选择题
For this test, a rover can move only when it has power. The rover is moving. Whi…
填空题
On Mars, a person must wear a special suit that supplies air and protects the bo…
词汇题
At the Mars base, clean water ______ (store) in large tanks.
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