They are putting too much carbon dioxide into the atmosphere, ______ prevents he
题型：不详难度：来源：
| They are putting too much carbon dioxide into the atmosphere, ______ prevents heat from escaping from the earth into space. |
答案
| C |
解析
| 本题考查定语从句。Which引导非限制性定语从句，代指前面的一句话。句意：他们把太多的二氧化碳排到大气中，阻止了热从地球逃逸到太空中。 |
举一反三
| It is so wet there _____ the trees are extremely tall, some measuring over 90 meters. |
______ is even more important is that the earth cooled down, water began to appear on its surface.| A．When | B．That | C．Which | D．What |
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Some people have the idea_____ you can cross Canada in less than five days.| A．what | B．that | C．which | D．when |
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Tom raised his hands to say something, but he remained silent in the end.| A．even if | B．as if | C．so that | D．now that |
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The government has taken some measures to solve the shortage of electricity , but it may be some time _________the situation improves.| A．since | B．when | C．before | D．unless |
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