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单项选择题
A.broke down
B.broke out
C.broke up
D.broke in
单项选择题
A.common
B.total
C.general
D.particular
单项选择题
A.covering
B.covered
C.cover
D.tocover
单项选择题
A.when
B.where
C.that
D.until
单项选择题
A.How
B.What
C.Which
D.Who