问题
选择题
You can't ____ your book when you are in the exam. Otherwise, you will be punished. [ ]
A. stick to
B. refer to
C. keep to
D. point to
答案
答案：B
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You can't ____ your book when you are in the exam. Otherwise, you will be punished. [ ]
A. stick to
B. refer to
C. keep to
D. point to
答案：B