As long as the laws of nature , there will be tornadoes.A．existB．are existingC．will existD．existed 题目和参考答案——青夏教育精英家教网—

题目内容

As long as the laws of nature ______, there will be tornadoes.

A．exist

B．are existing

C．will exist

D．existed

考查状语从句的时态。在条件状语从句里，用一般现在时代替将来时，主句用将来时。

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