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        1. I don’t know if Jack ________. If he ________, call me, please.

                   A. comes; come           B. will come; will come

                   C. will come; comes


          【答案】C

          【解析】考查從句時態(tài)用法。句意:我不知道杰克是否會來。如果他來了,請給我打電話。第一句中的if=whether, 引導(dǎo)的是賓語從句。Jack還沒有來,會不會來還不知道,該用將來時態(tài)還是用將來時態(tài)。后一句中的if從句為條件狀語從句。在時間和條件狀語從句中,用現(xiàn)在時態(tài)表示將來,所以選擇答案C。


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