Question

【题目】Don't release any harmful smoke into the air. The underlined part means “_______”.

A. let outB. drive awayC. clean upD. watch out

Answer 1

【答案】A

【解析】

句意：不要向空气释放任何有毒气体。划线部分什么意思？考查动词词组辨析。A. let out放出；B. drive away (把车)开走，赶走；C. clean up收拾干净，打扫；D. watch out当心，提防。根据后面宾语harmful smoke有毒气体。故选A。