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更新 2022-09-03
科目英语
题型单选题
难度中等
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The police at Denver International Airport examined a bomb threat against a United Airlines flight to San Francisco,____________ the flight for hours.

A．delayed

B．to delay

C．delaying

D．had delayed

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相关试题

Keep away from the dog , _______it will bite you.

A．and	B．so
C．or	D．but

题型：未知
难度：未知

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He made up his mind to devote all he could _____ his spoken English before going to college.

A．to be practicing	B．practicing
C．practice	D．to practicing

题型：未知
难度：未知

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We live in a society ______ there is a great deal of debate about competition.

A．where	B．which
C．when	D．that

题型：未知
难度：未知

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The fact ____ ancient Greek civilization had a great influence on Western culture is known to many people.

A．whether	B．that
C．if	D．how

题型：未知
难度：未知

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---_______ the farmers discovered the entrance to the secret cave in the valley?
--- Totally by chance.

A．When was it	B．How was it
C．How was it that	D．When was it that

题型：未知
难度：未知

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