Question

Bob is not talking．He ________ her．

1. A.
   listen to
2. B.
   is listening
3. C.
   is listening to
4. D.
   listen to

Answer 1

C
考查的是现在进行时。look，listen，now是现在进行时的标志。Bob is not talking呈现的是现在进行时，听某人说应用listen to，所以答案应是C。