Don’t worry about . He can do it well by himself. A. heB. himC. hisD. her

问题补充：

Don’t worry about . He can do it well by himself.

A. he

B. him

C. his

D. her

答案：

A. he

(答案→)B. him

C. his

D. her

解析：句意:不要为他担心，他一个人能把它做好。worry about 是一个固定的短语，意思是担心，在它的后面应该跟名词或代词来做宾语，故这个空应该用宾格的形式。he 是主格，意思是他；him 是宾格，他；his 是他的，物主代词；her 指女的她。根据句意可知选B。