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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
单项选择题
A.could
B.will have to
C.must to
D.might
单项选择题
A.insisted on
B.insisted at
C.insisted that
D.insisted in