------shall we have our picnic tomorrow?-----it doesn’t rain.A. UntilB. WhileC. OnceD. If

问题补充：

------shall we have our picnic tomorrow?

-----it doesn’t rain.

A. Until

B. While

C. Once

D. If

答案：

A. Until

B. While

C. Once

(答案→)D. If

解析：本题考查连词的用法，意思是：如果明天不下雨的话。