单项选择题
Lincoln, who many regard as one of our great presidents, was often ______ despite his reputation of telling good jokes.
A. bright
B. optimistic
C. gloomy
D. cheerful
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单项选择题
One of the effective ways to lessen environmental pollution is the reservation and protection of more swamps.
A. vast thick corals
B. pockets of wetland
C. warm volcanoes
D. millions of bees and wasps
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单项选择题
We will not be held responsible for any damage which results () rough handling.
A. from
B. off
C. in
D. to
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in。
or。
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