Two weeks ago I bought a bicycle. If you live in town it is often faster than a car and

问题补充：

Two weeks ago, I bought a bicycle. If you live in town, it is often faster than a car and you worry about parking.

A. must not

B. should not

C. don have to

D. may not

答案：

A. must not

B. should not

(答案→)C. don have to

D. may not

解析：考察情态动词用法。Must not禁止，千万不能；should not不应该；don have to不必；may not也许不；句意：两个星期前，我买了一辆自行车。如果你住在城里，自行车经常比汽车还有快，而且你不必担心停车的问题。根据句意说明使用C项。