–Look! Someone is cutting a tree on the moon.–It be true Granny. Our teacher says there

问题补充：

–Look! Someone is cutting a tree on the moon.

–It be true, Granny. Our teacher says there is no air there.

A. can

B. mustn

C. may

D. should

答案：

(答案→)A. can

B. mustn

C. may

D. should

解析：句意：看，有人在月亮上砍树。那不可能是真的，奶奶。我们老师说月亮上没有空气。Can’t 表示推测时，用于否定句，“不可能”；mustn’t 禁止，不要；may 可能；should 应该。根据句意，选A。