Question

--- Has he finished his report yet?

--- I’m not sure. He _______ the report these days.

1. A.
   has been writing
2. B.
   is writing
3. C.
   wrote
4. D.
   has written

Answer 1

A
考查时态，由问句和后面的these days可知道是现在完成进行时态，所以选A