A lesson from the terrible drought that hit some parts of southwestern China this year is that more anti-drought projects built in the past years.A．should beB．should not have beenC．ought to have be 题目和参考答案——青夏教育精英家教网—

题目内容

A lesson from the terrible drought(干旱) that hit some parts of southwestern China this year is that more anti-drought projects ______ built in the past years.

A．should be	B．should not have been
C．ought to have been	D．must be

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