15.　　 ---Shall we go there by boat for a change?

---______.

A. You say　 B. It is up to you　 C. It is hard to say　 D. It is easy to tell

14.　　 Excuse me. I _____ I was blocking your way.

A. didn’t realize　 B. don’t realize　 C. haven’t realized　 D. won’t realize

13.　　 _____ terrible weather we’ve been having these days!

A. How　 B. How a　 C. What　 D. What a