单项选择题

Silver is the best conductor of electricity, copper （） it closely.

A. followed
B. following
C. to follow
D. being followed

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单项选择题
I don’t like （） bills, but when I do get them I like （） them promptly.

A. to get, paying
B. getting, to pay
C. to get, to pay
D. getting, paying
单项选择题
Can you have your report （） tomorrow.

A. finish
B. finished
C. to finish
D. finishing
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