题目内容：

As my dad unwrapped（打开）the new bicycle helmet（头盔）that I got him for his birthday, I realized that a number of people ride their bicycles every day without the protection of a helmet.

Due to cold winters across the country, riding has become increasingly dangerous as many roads have holes and are torn-up（磨损的）. Not everyone realizes that there are laws requiring the wearing of helmets in many places.

Where I live, there has been a law in place since October 1, 1992 stating that cyclists of all ages are required to wear helmets. Unfortunately, accidents can happen to the best of riders. My dad has been a cyclist for many years, and he often rides around my county and to Rockland Lake State Park.

One afternoon, as he was just entering the park, he lost control of his bicycle and flew off and landed on a nearby patch of grass, breaking his helmet into pieces and losing consciousness（知觉）. When he was just awakening, a lovely couple found him and brought him back to our house, where he attempted to recall the events leading up to his fall. Later that day, a CAT scan showed that he had a concussion (脑震荡). That evening, while my dad was showing me the pieces of his broken helmet, we both came to a shocking realization.

If he had not worn his helmet, he probably would have cracked his skull and perhaps died. Today, when my dad and I go out cycling, the wearing of our helmets is not even a question. Regardless of age, everyone should wear a helmet whenever they get on a bicycle.

1.In the writer’s opinion, why should people wear bicycle helmets?

A. Because a law requires them to do so.

B. Because many people like wearing bicycle helmets.

C. Because people have realized the importance of wearing helmets.

D. Because the conditions of roads are very poor and it is dangerous to ride on them.

2.The underlined part “we both came to a shocking realization” in Paragraph 4 means “_______”.

A. we understood how lucky the dad was to have worn a helmet

B. we were shocked to see the broken helmet

C. we realized that young people needn’t wear helmets

D. only old people should wear helmets

3.From the accident that happened to the writer’s dad, we can infer that ___________.

A. the cyclists should follow the law

B. his dad was not worried about this accident

C. it is necessary for cyclists to wear helmets

D. everyone should care about life