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 amount left in my pocket is little.
A．Having paid my taxes
B．Paying my taxes
C．My taxes having been paid
D．My taxes have been paid
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