【題目】I don't know if it __________ tomorrow. If it ___________, we will go out for a picnic.
A.will rain; won't rain
B.rains; doesn't rain
C.rains; won't rain
D.will rain; doesn't rain

【答案】D
【解析】句意:我不知道是否明天會下雨。如果不下雨, 我們將出去野餐。if連詞有兩種用法:一、引導(dǎo)賓語從句,意思是"是否";二、引導(dǎo)條件狀語從句,意思是"如果",時態(tài)要注意"主將從現(xiàn)"的原則。所以選D。

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