单项选择题

They ______ because the light's on!

A．must have gone out
B．can't have gone out
C．mustn't have gone out
D．can't go out
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单项选择题
Children who are over-protected by their parents may become ______.
A．hurt
B．having used
C．spoiled
D．harmed
单项选择题
Another type of lyricist I could only call, ______ a better name, the traditionalist.
A．because lack of
B．for lack
C．for lack of
D．because of lack
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