【題目】—It is a pity that the disease is terrible at present.

—Yes. It will be worse ________ we take action to do something for it.

A.ifB.unlessC.untilD.when

【答案】B

【解析】

句意：——遺憾的是，這種病目前很嚴(yán)重。——是的。如果我們不采取行動，情況會更糟。

考查連詞。此處需要填寫連詞連接兩個句子。if是否，如果，引導(dǎo)條件狀語從句；unless如果不，引導(dǎo)條件狀語從句；until直到，引導(dǎo)時間狀語從句；when當(dāng)……時候，引導(dǎo)時間狀語從句。根據(jù)“It will be worse”將會更糟糕，可知后半句表示“如果不采取行動”，表示條件，引導(dǎo)條件狀語從句。unless符合題意，故選B。

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