Smoking is very harmful to our body.

Smoking can hurt our lungs (肺) and heart. It makes people cough easily and can cause (造成) bad illnesses. Many people get sick or even die from smoking every year.

Smoking is bad not only for smokers but also for people around them. The second-hand smoke is harmful too. It is very bad for children and old people.

1.1. Smoking is ______ for our health.

A good

B bad

C helpful

D

解析：选B。B 细节理解题。原文提到“Smoking is very harmful to our body.”，说明吸烟对健康有害。故选 B。

2.2. Smoking can hurt our ______.

A eyes

B hair

C lungs

D

解析：选C。C 细节理解题。原文提到“Smoking can hurt our lungs and heart.”吸烟会伤害肺部和心脏。故选 C。

3.3. Second-hand smoke is ______.

A safe

B dangerous

C good

D

解析：选B。B 细节理解题。原文提到“The second-hand smoke is harmful too.”，表明二手烟是危险的。故选 B。

4.4. We can see “______” signs in many public places.

A No Smoking

B No Parking

C No Photos

D

解析：选A。A 细节理解题。原文提到“In many public places, there are ‘No Smoking’ signs.”，公共场所有禁止吸烟标识。故选 A。

5.5. What does the writer want us to do?

A Learn to smoke.

B Never smoke.

C Watch others smoke.

D

解析：选B。B 细节理解题。原文提到“We must say no to smoking and live a healthy and happy life.”我们必须拒绝吸烟，过上健康快乐的生活。作者呼吁不要吸烟。故选 B。