--- Mrs. White, when shall we go for a picnic?

---If it _____, we _____ for a picnic in the park tomorrow.

A. rains；will go                                              B. will rain；go

C. doesn’t rain；will go                                    D. doesn’t rain；go

---Shall we go to the Pingshan Hall for a picnic tomorrow?

---Yes. If it ________.

　 A. will not rain　　　　 B. didn’t rain　　　　C. isn’t raining　　　 D. doesn’t rain