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单项选择题
A.If
B.But
C.Whereas
D.Whether
单项选择题
A.whom
B.for whom
C.to whom
D.who
单项选择题
A.Presumably
B.Respectively
C.Imaginably
D.Plausibly
单项选择题
A.operated
B.having been operated
C.is operated
D.is being operated
单项选择题
A.when
B.since
C.before
D.after