单项选择题

______ is known to the world, Mark Twain is a great American writer.

A．That
B．Which
C．As
D．It
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单项选择题
Jean didn't have time to go to the concert last night because she was busy ______ for her examination.
A．to prepare
B．to be prepared
C．preparing
D．being prepared
单项选择题
You ______ to remember more and, in most cases, will be tested on what you read.
A．are expect
B．expect
C．expects
D．are expected
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