单项选择题

The professor requests that we （） the term papers by the end of this month.

A．hand in
B．will have handed in
C．to hand in
D．will hand in

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单项选择题
So little （） about China that he could not find Beijing in the world map.

A．the foreigner knew
B．did the foreigner know
C．the foreigner has known
D．has the foreigner known
单项选择题
The President of Harvard pioneered the elective system by （） students were able to choose their own courses of study.

A．what
B．whom
C．that
D．which
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