I kept looking at the man, wondering _______.
- A.
whether I have seen him before
- B.
whether I had seen him before
- C.
that I had seen him before
- D.
when I saw him before
B
這題考查賓語(yǔ)從句的時(shí)態(tài) ，因?yàn)槭莃efore強(qiáng)調(diào)的是過(guò)去的過(guò)去，要用過(guò)去完成時(shí)，wonder“想知道”后面應(yīng)該是疑問(wèn)詞引導(dǎo)的賓語(yǔ)從句。選B。
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