2. 外语
  3. When you read the book, you’d better make a mark______you have any questions.

When you read the book, you’d better make a mark______you have any questions.

admin2013-11-10  26
问题 When you read the book, you’d better make a mark______you have any questions.
选项 A、at which
B、at where
C、the place
D、where
答案D
解析
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专业英语四级

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