【題目】除非人們都注意保護(hù)環(huán)境,否則我們很難呼吸到干凈的空氣。

________________________________________________________

【答案】Unless people all pay attention to protecting the environment, it’s hard for us to breathe the clean air.

【解析】

考查詞匯運(yùn)用能力。題干是一個含有條件狀語從句的主從復(fù)合句。unless除非，引導(dǎo)條件狀語從句。pay attention to注意，動詞短語，后接名詞、代詞或動名詞。protect保護(hù)，動詞。environment環(huán)境，名詞。It’s+形容詞+（for sb.）to do sth.做某事對某人而言是……，固定句式。hard困難的，形容詞。breathe呼吸，動詞。clean air干凈的空氣。根據(jù)中文提示，故答案為Unless people all pay attention to protecting the environment, it’s hard for us to breathe the clean air.

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