下列四句是“这本书我已经买了三个月了。”的英译文,哪一种不对?
A. I have had this book for three months.
B. I have bought this book for three months.
C. I bought this book three months ago.
D. It is three months since I bought this book.
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--Come in, Peter, I want to show you something.Oh, how nice of you! I_____ you _____to bring me a gift.
A. never think; are going
B. never thought; were going
C. didn’t think; were going
D. hadn’t thought; were going
When I was at college I _____three foreign languages, but I_____ all except for a few words of each.
A. spoke; had forgotten
B. spoke; have forgotten
C. had spoken; had forgotten
D. had spoken; have forgotten
The police found that the house _____and a lot of things____.
A. has broken into; has been stolen
B. had broken into; had been stolen
C. has been broken into; stolen
D. had been broken into; stolen
外毒素的特性不包括（ ）
A. 化学本质是蛋白质
B. 毒性强
C. 对组织器官无选择性
D. 不耐热
E. 可用甲醛脱毒而制成类毒素
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