I'll go to the zoo if it __tomorrow.A.won't rainB.will rainC.doesn't rain D.rains

问题描述:

I'll go to the zoo if it __tomorrow.A.won't rainB.will rainC.doesn't rain D.rains

答案是C
语法
主将从先的原则:
I'll go to the zoo (这里是主句)if it doesn't rain tomorrow(这里是从句).