—You see, a man is cutting a tree on the moon.

—It _________ be true. The teacher says there is no air on the moon. [ ]

A. can't

B. may not

C. shouldn't

D. mustn't

白蚁的防治方法有( )等，可根据不同的情况采用相应方法来防治白蚁。

A．堵眼法

B．药杀法

C．诱杀法

D．生物防治法

E．挖巢法