单项选择题

It is necessary for students to take tests at monthly ______.

A．intervals
B．times
C．periods
D．terms
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单项选择题
No ______ that she failed in the final exam. She has always been so careless.
A．wonder
B．matter
C．guess
D．terms
单项选择题
The other day your cousin came to visit us without giving notice
A．in addition
B．in advance
C．in fact
D．in nature
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