Question

【题目】You mustn't drive a car on the road you are 18 years old.

A.becauseB.whenC.unlessD.if

Answer 1

【答案】C

【解析】

句意：除非你18岁，否则你不能开车上路。

考查连词辨析。because因为；when当……时；unless除非；if如果，根据所给空前面的句子You mustn't drive a car on the road以及后面的句子you are 18 years old可知，unless最符合语境，故选C。