Question

－Hi, Joan, I haven’t seen you for ages．What ________ recently?

－Carrying on some research on wildlife．

[　　]

A．

did you do

B．

have you done

C．

were you doing

D．

have you been doing

Answer 1

答案：D
解析：

答句是个省略句，完全形式应为“I have been carrying on some research on wildlife．”。由此可知应用现在完成进行时。