6．I really don't know if she_____ it when she_____．（　�。�
A．finds，arrivesB．finds，will arrive
C．will find，will arriveD．will find，arrives

分析 我真的不知道當(dāng)她到了的時(shí)候她是否能找到．

解答 答案：D．if引導(dǎo)的是賓語(yǔ)從句，主句是一般現(xiàn)在時(shí)，從句時(shí)態(tài)不受限制，when引導(dǎo)的時(shí)間狀語(yǔ)從句，遵循主將從現(xiàn)的規(guī)則，從句主語(yǔ)she，故arrives，故答案是D．

點(diǎn)評(píng) 在時(shí)間、條件狀語(yǔ)從句中，主句用一般將來(lái)時(shí)，從句要用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)．
例如：
I will let you know if he comes．
We will inform him when he gets here．

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