单项选择题

______ have we seen such an effective actor as he has proven himself to be.

A．Certainly
B．Sometimes
C．Rarely
D．Once
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单项选择题
There are ______ members in our English Club.
A．two hundreds and ninety-five
B．two hundred and ninety-five
C．two hundreds and ninety five
D．two hundreds and ninety fives
单项选择题
They concentrated their efforts on ______ products of high quality.
A．turning on
B．turning off
C．turning out
D．turning over
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