单项选择题

______make good progress.

A．Only by working hard they can
B．By only working hard they can
C．Only by working hard can they
D．Only they can by working hard
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单项选择题
______his glasses, he couldn't read the report.
A．Broke
B．Broken
C．Being broken
D．Having broken
单项选择题
The problem was so serious that the general manager had to take______ himself to solve it.
A．charge
B．change
C．notice
D．place
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