1 . The phone is ringing! ________ it be your teacher Shawn? He was looking for you the whole morning since you’ve got so many Fails!

A．Can

B．Would

C．May

D．Will

2 . Mountain climbing ______ be really dangerous at times even though it is challenging and exciting in general.

A．can

B．should

C．shall

D．must

3 . Tom ____ be ill, for I saw him playing basketball an hour ago.

A．mustn’t

B．needn’t

C．can’t

D．may not