单项选择题

He would certainly have got there on time ______.

A．had he not had a flat tire
B．if he didn't get a flat tire
C．if the flat tire hadn't happened
D．had the tire hadn't flattened itself
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单项选择题
In the past, most foresters have been men, but today, the number of women ______ this field is climbing.
A．engaging
B．devoting
C．registering
D．pursuing
单项选择题
If I ______ in this cap, I wouldn't feel so conspicuous.
A．wasn't dressed
B．didn't dress
C．weren't dressed
D．don't dress
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