单项选择题

The topic of your investigation must be something______ .

A．from which you can form your report
B．that you are interested in
C．that your teacher approves
D．that you already have in your mind
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单项选择题
—Mummy, I have broken my train. —I told you so. You ______ on it.
A．mustn't have ridden
B．couldn't ride
C．shouldn't have ridden
D．needn't ride
单项选择题
The course can help you to ______ .
A．select your career interests
B．make suggestions to your friends
C．design your investigation
D．find solutions to many issues
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