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【单选题】

It will be at least three years _______ we get to meet again.

A.
before
B.
after
C.
since
D.
when
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参考解析:
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举一反三

【单选题】They are ______ at the _______ news.

A.
frightening, frighten
B.
frightened, frightening
C.
frightening, frightening
D.
frightened, frightened