Question

-- You look exhausted! 

-- I __________ tennis with my friend all the morning.

1. A.
   played
2. B.
   had played
3. C.
   have been playing
4. D.
   will play

Answer 1

C
考查时态。根据关键词all the morning可知这里是指一直在做某事，用完成进行时表示从过去某个时间开始到现在一直在做的事情。句意：我一直在和我的朋友打网球。