【題目】— Let’s go for a picnic if it ________ tomorrow.

— But nobody knows if it ________ tomorrow.

A. won’t rain; rains B. doesn’t rain; will rain

C. doesn’t rain; rains. D. won’t rain; will rain

【答案】B

【解析】

句意：——如果明天不下雨，我們就去野餐吧�！菦]有人知道明天會不會下雨。根據(jù)句意可知，第一個if是“如果”的意思，引導(dǎo)的是條件狀語從句，if引導(dǎo)的條件狀語從句的時態(tài)用一般現(xiàn)在時態(tài)表示將來，排除A,D選項；第二個if是“是否”的意思，引導(dǎo)的是賓語從句，根據(jù)時間狀語tomorrow判斷，從句的時態(tài)為一般將來時態(tài)，故答案為B。

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