【題目】—What a heavy haze (霾)! The air pollution is terrible now.

—It will be worse ______ we take action to protect the environment.

A.ifB.unlessC.becauseD.although

【答案】B

【解析】

句意：——多嚴(yán)重的霧霾！現(xiàn)在空氣污染很嚴(yán)重。——如果我們不采取行動保護(hù)環(huán)境，情況會更糟。

考查連詞辨析。if如果，引導(dǎo)條件狀語從句；unless除非，如果不，引導(dǎo)否定的條件狀語從句；because因為，引導(dǎo)原因狀語從句；although雖然，盡管，引導(dǎo)讓步狀語從句。根據(jù)句意可知后面表示否定條件，前句表示結(jié)果，故選B。

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