单项选择题

All _______ is a continuous supply of fuel oil.

A．what is needed
B．that is needed
C．the thing needed
D．for their needs
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单项选择题
In Boston, as in the rest of the United States, _______ schooling begins at age, 5 and ends at 16.
A．oblidged
B．compulsory
C．compelling
D．forced
单项选择题
It is necessary that an efficient worker _______ his work on time.
A．accomplishes
B．can accomplish
C．accomplish
D．has accomplished
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