—Who is speaking there? —It be Uncle Li. He has gone to Shanghai.A. mustB. can’tC. mightD.

问题补充：

—Who is speaking there?

—It be Uncle Li. He has gone to Shanghai.

A. must

B. can’t

C. might

D. should

答案：

A. must

(答案→)B. can’t

C. might

D. should

解析：句意：谁在说话呢？它不可能是李叔叔。他已经去了上海。must 必须；can’t 不能，不会，不可能；might 可以，可能；should应该。由He has gone to Shanghai知，应选B。