情态动词表推测 — 英语词汇题
题目
A rock from Mars is inside a sealed case. Tests show that it is made only of stone and has no living cells. It ______ be an animal.（用适当的情态动词填空）
《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…
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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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