单项选择题

A．They are very. rewarding.
B．They are too time-consuming.
C．They are not helpful at all.
D．They are too troublesome.
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单项选择题
We carved the hero's name on the monument __________ future generations should know what he had done.
A．in order that
B．now that
C．for fear that
D．in that
单项选择题
As the chairman of the students' union, Thomas was said __________ other students in need.
A．to help
B．to be helping
C．to have helped
D．to have been helped
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