单项选择题

The price of seafood used to be much lower than now, ______

A. wasn't there
B. wasn't it
C. doesn't it
D. didn't it
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单项选择题
It has been estimated that the earth's surface temperature has increased ______ one quarter to three quarters of a degree since 1850. ~
A. to
B. by
C. at
D. with
单项选择题
He was _____________ by the police with having murdered his wife.
A. arrested
B. accused
C. sentenced
D. charged
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