单项选择题

When ( ) the education systems of China and Britain, the professor gave his own comment.

A．asking to be compared
B．asked him to compare
C．asking him to compare
D．asked to compare
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单项选择题
( ) leaves the room at last ought to turn off the lights.
A．Anyone
B．The person
C．Whoever
D．Who
单项选择题
John and I ( ) friends for eight years. We first got to know each other at a Christmas party. But we ( ) each other a couple of times before that.
A．had been; have seen
B．have been; have seen
C．had been; had seen
D．have been; had seen
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