It is almost five years__________ we saw each other last time.?
A．beforeB．sinceC．a(chǎn)fterD．when
B?
解此題的關(guān)鍵在于主句與從句在時(shí)態(tài)上保持一致。用A、C、D三項(xiàng)的連接詞引導(dǎo)時(shí)間狀語從句時(shí)，與主句的時(shí)態(tài)明顯不一致。since引導(dǎo)從句時(shí)常用過去時(shí)，主句則用一般現(xiàn)在時(shí)或現(xiàn)在完成時(shí)。?
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