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【英文】選擇

本帖最後由 24732458 於 2014-2-9 21:23 編輯

When the police looked closely at the wreck, they couldn't help ____ that the car had been traveling too fast.
(A)seeing
(B)to see
(C)but seeing
(D)but to see
為甚麼答案是A不是B

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