单项选择 较难0.4 引用4 组卷298
Sending people to Mars ______ happen if scientists find ways to supply humans with enough air, water and food.
A.can | B.must | C.should | D.need |
22-23九年级上·上海·期末
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— Dad, why should I stop ______ computer games?
— For your health, my boy, I’m afraid you ______.
— For your health, my boy, I’m afraid you ______.
A.to play; must | B.playing; have to |
C.to play; can | D.playing; may |
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