30. It was only after he had read the papers Mr. Gross realized the task before him was extremely difficult to complete. | 爱思学题库

单选题

30. It was only after he had read the papers Mr. Gross realized the task before him was extremely difficult to complete.

A.

when

B.

that

C.

which

D.

what

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[单选题] 31. A serious study of physics is impossible some knowledge of mathematics.

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[单选题] 29. It may not be a great suggestion. But before is put forward, we’ll make do with it.

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高考真题 2013 全国Ⅱ卷英语

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