单选题 Questions 14 to 17 are based on the following passage.

单选题 Why is Laura at the bicycle shop?

A、 She"s waiting for her father.
B、 She"s having her bicycle repaired.
C、 She wants to surprise John.
D、 She works there.

【正确答案】 D

【答案解析】[解析] 推理题。从对话可知，这个自行车修理店是Laura父亲的，她在父亲的店里帮忙做事，比较几个选择项，D项最接近，因此正确答案是D。

单选题 Why does John want to buy a bicycle?

A、 To replace his stolen bicycle.
B、 To begin bicycling to work.
C、 To join a bicycle club.
D、 To train for a bicycle race.

【正确答案】 B

【答案解析】[解析] 推理题。John在对话中提到“天气变暖和了，我想多锻炼，不想总是乘公车”，由此可以推断他是想骑自行车去上班。因此答案是B。

单选题 What does Laura suggest that John do?

A、 Buy a used bicycle.
B、 Buy a racing bicycle.
C、 Replace the tires on his bicycle.
D、 Sell his old bicycle to the shop.

【正确答案】 A

【答案解析】[解析] 推理题。John提到自己不想买赛车(racer)，即racing bicycle，因此可以排除B；另外，对话中也没有提到C Replace the tires on his bicycle或D Sell his old bicycle to the shop；对话中John同意Laura提议他买的“trade-in(折价之旧物品)”，因为价格不贵，而且质量还不错，正合他的想法。因此正确答案是A。

单选题 What does Laura say is most important about a bike?

A、 It must be the right height.
B、 It must have several gears.
C、 It must have good tires.
D、 It must be the right weight.

【正确答案】 A

【答案解析】[解析] 细节题。对话中Laura提到“For the kind of ride you are going to be doing, the most important thing is comfort. You want to make sure it"s the right height for you.”可见“comfort(舒服)”和“the right height(适当的高度)”是Laura认为最重要的。因此正确答案是A。