单项选择题

That job is quite difficult. I can understand why you have ______ so many problems. ( )

A．run for
B．run over
C．run off
D．run into
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单项选择题
Our maths teacher is a man whom everyone looks ______. ( )
A．up
B．up to
C．on
D．in
单项选择题
It is very ______ of you to let us know you were going to be late. Otherwise, we ______ on time. ( )
A．considerate...wouldn't have begun
B．inconsiderate...would have begun
C．considerable...wouldn't have begun
D．inconsiderable...wouldn't begin
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