单项选择题

It is requested that every student ______a paper on sustainable development.

A．writes
B．wrote
C．writing
D．write
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单项选择题
These pictures______ to his mind his previous days in China.
A．brought up
B．brought back
C．brought about
D．brought forth
单项选择题
I have bought a story book ______there are many pictures.
A．in which
B．with which
C．which
D．in that
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