单项选择题

In the advanced course students must take performance tests at monthly _________.

A．gaps
B．intervals
C．length
D．distance
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单项选择题
Having been found guilty, the man was given a severe _________ by the judge.
A．service
B．sentence
C．crime
D．crisis
单项选择题
I must have browsed through hundreds of guides but I've no _________ where to go for this year's holiday.
A．concept
B．remark
C．idea
D．thought
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