—John come here tonight?—I’m not sure but he stay at home.A. May mightB. Can mustC. Mu

问题补充：

—John come here tonight?

—I’m not sure, but he stay at home.

A. May, might

B. Can, must

C. Must, might

D. Can, might

答案：

A. May, might

B. Can, must

C. Must, might

(答案→)D. Can, might

解析：can、 may、might都可用来表达可能性，但may、might不用于疑问句，且might表示成为现实的可能性更小。由I’m not sure可知第二空应用might。故选D。