问题
选择题
As long as the laws of nature ______, there will be tornadoes.
A．exist
B．are existing
C．will exist
D．existed
答案
答案：A
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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As long as the laws of nature ______, there will be tornadoes.
A．exist
B．are existing
C．will exist
D．existed
答案：A
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。