单项选择题

"What's the matter with that picture on the wall"
"It needs _________ ."

A．straightening
B．to be straightening
C．straightened
D．straighten
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单项选择题
A．asB．whenC．so long asD．since
A．as
B．when
C．so long as
D．since
单项选择题
A．compareB．comparableC．comparsonD．proportion
A．compare
B．comparable
C．comparson
D．proportion
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