—Look at that girl! Is it Susan?—No it be her. She has gone back to her hometown.A. must

问题补充：

—Look at that girl! Is it Susan?

—No, it be her. She has gone back to her hometown.

A. mustn’t

B. can’t

C. needn’t

D. wouldn’t

答案：

A. mustn’t

(答案→)B. can’t

C. needn’t

D. wouldn’t

解析：本题回答语的含义是她到家乡去了，所以不可能是苏珊，can’t表示不可能的意思，故本题选B。