You’d better carry a(n)tyre in the back of your car in case it breaks down on the way.A. e

问题补充：

You’d better carry a(n)tyre in the back of your car in case it breaks down on the way.

A. extra

B. free

C. convenient

D. spare

答案：

A. extra

B. free

C. convenient

(答案→)D. spare

解析：词义辨析。 A.额外的 B. 免费的；空闲的 C. 方便的 D. 多余的；备用的；句意：万一在路上抛锚，你最好在车后备箱里带一个备用的轮胎。故选D。