Tom. Mary can’t open the box. can you give a helping hand?A. sheB. herC. hersD. herself

问题补充：

Tom. Mary can’t open the box. can you give a helping hand?

A. she

B. her

C. hers

D. herself

答案：

A. she

(答案→)B. her

C. hers

D. herself

解析：动词后用人称代词宾格，所以用她的宾格her。