【題目】—The air pollution is terrible.

—It will be worse _____ everyone plays a part in saving the environment.

A.IfB.unlessC.until

【答案】B

【解析】

句意:——空氣污染很嚴(yán)重。——除非每個人都在保護(hù)環(huán)境方面發(fā)揮作用,否則情況會更糟。

考查連詞辨析。If如果; unless除非; until直到。根據(jù)“everyone plays a part in saving the environment.”可知此處是unless引導(dǎo)的條件狀語從句,遵循主句用一般將來時,從句用一般現(xiàn)在時態(tài)。根據(jù)題意,故選B。

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