单项选择题

Some cities have passed laws that allow coal and oil ______ only if their sulfur con- tent is low.

A．burning
B．to burn
C．being burned
D．to be burned
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单项选择题
In order to buy her house she had to obtain a ______ from the bank.
A．finance
B．capital
C．loan
D．debt
单项选择题
This question is too hard; it is ______ my comprehension.
A．below
B．beyond
C．over
D．without
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