题目内容

When something is on fire, people throw sand on it to put out the fire. The main use of the sand is to _________.
A.protect the thing on fire
B.add weigh to the thing on fire
C.keep the air away from the thing on fire
D.lower the temperature of the thing on fire
C

试题分析:句意:当某物起火的时候,人们扔沙子在火上面。主要目的是用沙子去阻止空气与火的接触。考查固定短语:keep sth. away from sth.保持某物远离某物。故选C
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