单项选择题

A friend of mine returned to his house after a holiday, only to find it（）broken into.

A．to be
B．had
C．was
D．had been

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单项选择题
（）, such problems concerning environment protection are not as easy to solve as they look.

A．Speak generally
B．To speak generally
C．Generally speaking
D．General speaking
单项选择题
As a student in that famous school, Henry used to look hurt when（）

A．scolded
B．having scolded
C．to scold
D．scolding
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