单项选择题

______ if I had arrived yesterday without letting you know beforehand

A．Would you be surprised
B．Were you surprised
C．Had you been surprised
D．Would you have been surprised
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单项选择题
All flights ______ because of the storm, they decided to take the train.
A．having canceled
B．were canceled
C．having been canceled
D．have been canceled
单项选择题
______ orbits the Sun, Uranus rotates on its axis, an imaginary line through its center.
A．For it
B．It
C．As it
D．There it
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