I don't know if it ------tomorrow. if it -----,we'll go to the Great Wall. A.will rain , won't rain B will rain ,doesn'train C.rains, won't rains D. rains ,doesn't rain 选什么?为什麽?if有什么用法
选:B. will rain , doesn't rain 因为: I don't know if it ------tomorrow. “我不知道明天是否会下雨”,if 引导宾语从句,表示:“是否”, “是否会下雨”要用 “if it will rain”。 if it -----,we'll go to the Great Wall. 意思是:“如果明天不下雨,我们将去长城”,if 引导条件状语从句,表示:“如果”,在表示将来的条件状语从句中,谓语动词用一般现在时态,所以用“doesn't rain ”。因此综合2个空格考虑,应该选择B. 祝您进步。