单项选择题

After the typhoon, people came back to their villages, many of their houses ______.

A．pulled down
B．were pulled down
C．to be pulled down
D．were being pulled down
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They decided to have an outing, but it ______ a rainy day, they had to stay at home.
A．was
B．being
C．has been
D．having been
单项选择题
When ______ the whole universe, our earth doesn t seem big at all.
A．compare
B．to compare
C．comparing
D．compared to
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