-- Look at that girl. Is it Susan?--No it be her. She has gone back to her home town .A.

问题补充：

-- Look at that girl. Is it Susan?

--No, it be her. She has gone back to her home town .

A. can

B. mustn

C. needn

D. may not.

答案：

(答案→)A. can

B. mustn

C. needn

D. may not.

解析：根据文章内容She has gone back to her home town，可知答案为A，故选答案为A