Question

You must be tired. You ________ the book for the whole afternoon.

1. A.
   has read
2. B.
   have read
3. C.
   have been reading
4. D.
   had been reading

Answer 1

C
从“一整下午”和“你一定累了”来看，说话人强调的动作在持续进行，并非结果，应用现在完成进行时为好．