单项选择题

He often attends public lectures at the university of California chiefly （） his English.

A．to improve
B．as to improve
C．to import
D．expect for

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单项选择题
He as well as I （） you on that point.

A．agree with
B．agree to
C．agrees with
D．am to agree
单项选择题
They decided to chase the cow away （） it did more damage.

A．unless
B．until
C．before
D．although
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