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hisbook,hehadtogotothebookstoretobuyonebeforehewenttoschool.A.HavinglostB.LostinC.LostD.Hehadlost

题目详情
______his book,he had to go to the bookstore to buy one before he went to school.
A.Having lost B.Lost in C.Lost D.He had lost
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答案和解析
A.由had看出是过去时,所以前面的原因状语用过去完成时,表示过去的过去对过去的影响,且he是having lost的逻辑主语