By the time you finish the book, you _______________ more about Chinese history.

A．will learnB．have learntC．will have learntD．a(chǎn)re learning

C

解析試題分析：考查時(shí)態(tài)。By與完成時(shí)連用。當(dāng)by后面是過去的時(shí)間，使用過去完成時(shí)；當(dāng)by后面是現(xiàn)在的時(shí)間，使用現(xiàn)在完成時(shí)，當(dāng)by后面是將來的時(shí)間的時(shí)候，使用將來完成時(shí)。本題By后面的時(shí)間狀語從句the time you finish the book用一般現(xiàn)在時(shí)代替將來時(shí)，所以主句使用將來完成時(shí)。故C正確。
考點(diǎn)：考查時(shí)態(tài)
點(diǎn)評：By與完成時(shí)連用。當(dāng)by后面是過去的時(shí)間，使用過去完成時(shí)；當(dāng)by后面是現(xiàn)在的時(shí)間，使用現(xiàn)在完成時(shí)，當(dāng)by后面是將來的時(shí)間的時(shí)候，使用將來完成時(shí)。

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