单项选择题

We met the old man () times on the way home.

A. dozen of
B. dozen
C. dozens
D. dozens of

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单项选择题

What is implied but not stated in the passage is that in the past ().

A. blue-collar workers made a better living than white-collar workers
B. college and graduate schools trained more skilled workers
C. there were more white-collar workers than blue-collar workers
D. there were less white-collar workers than blue-collar workers

单项选择题

How is your mother now She had her temperature () in the hospital.

A. to be taken
B. to take
C. taken
D. take