—You see, a man is cutting a tree on the moon. —It _________ be true. The teacher says there is no a
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题目简介
—You see, a man is cutting a tree on the moon. —It _________ be true. The teacher says there is no a
题目详情
—It _________ be true. The teacher says there is no air on the moon.
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B. may not
C. shouldn't
D. mustn't
答案