单项选择题

The classroom needs __________.

A．clean
B．to clean
C．to be cleaned
D．being cleaned
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单项选择题
We can infer from the passage that the writer __________.
A．thinks it is a good drink
B．is a lemonade manufacturer
C．tries to convince people that it is good for them
D．is a medical researcher
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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