单项选择题

All the flights _________ because of the snowstorm, we had to take Ihe train instead.

A．were canceled
B．had been canceled
C．having canceled
D．having been canceled
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单项选择题
Most of the earliest _________ into America came from Europe.
A．migrants
B．emigrants
C．immigrants
D．inhabitants
单项选择题
All too _________ it was time to go back to school after the Spring Festival.
A．quick
B．soon
C．fast
D．speedy
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