----Whatagoodboy! ----Soheis.He

问题详情：

 ---- What a good boy !

  ---- So he is. He ____ hard at his studies all the time.

A. works                                            B. is working 

C. had been working                               D. will be working

【回答】

B

知识点：动词时态与语态

题型：选择题