单项选择题

() what to do, he went to the old man for help.

A. Not knowing
B. Not know
C. Not to know
D. Not known

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单项选择题
In their letter to the students' representative assembly, the freshmen insisted on()in the Student Union.

A. represented
B. being represented
C. having represented
D. have been represented
单项选择题
Will he be able to win the championship()

A. I don't fear so
B. I don't guess so
C. I don't hope so
D. I don't think so
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