--Jack，you seem very happy.
-- Our class has won the relay-race
A. Guess what?
B. So what?
C. No wonder.
D. No doubt.
网友回答
(答案→)A. Guess what?
B. So what?
C. No wonder.
D. No doubt.
解析：考查交际用语。A猜猜看怎么了？B那又怎么样？C难怪。D毫无疑问；句意：—Jack，你似乎很高兴啊！—猜猜发生什么事情了？我们班级赢了接力赛。根据句意说明A正确。