【題目】Please ask your English teacher for help if you _________ the words.

A. don't knowB. won't knowC. didn't knowD. aren't knowing

【答案】A

【解析】

句意:如果你不認識這些單詞,請向你的英語老師求助。don’t know不認識,一般現(xiàn)在時;won’t know一般將來時;didn’t know一般過去時;aren’t knowing現(xiàn)在進行時。句中if引導的是條件狀語從句,主句是祈使句,從句中應用一般現(xiàn)在時,故應選A。

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