P1 Although marijuana is used as a remedy for some serious
diseases, many studies show that it has many negative effects on
the body. When marijuana is smoked, the dangerous chemicals
rapidly pass from the lungs into the bloodstream. The bloodstream
carries them to the brain and other organs throughout the body.
Four of the most affected organs are the lungs, brain, reproductive
system and heart.
P2 There is enough evidence that marijuana increases the risk
of lung cancer and infection. It also affects the lungs’ ability to
bring in oxygen and get rid of carbon dioxide and germs. So
Marijuana smokers are often at higher risk of developing breathing
difficulties, chronic cough and chest pain.
P3 As for the brain, marijuana damages brain cells that control
your thinking and ability to remember. Research shows that regular
use of marijuana will damage their brain structures. Therefore, teens
who are regular smokers of marijuana will not be able to have normal
brain development. Regular use of marijuana also increases the risk
for mental illness among teens.
P4 Marijuana use affects sperm production. That is, it
decreases and damages sperm. It also decreases testosterone levels
in men and lowers sex drive, which may lead to the inability to enjoy
sex. In females, marijuana decreases estrogen production and
therefore affects the quality of eggs. In short, smoking marijuana
leads to infertility in both men and women.
P5 Marijuana makes the heart beat more rapidly and the blood
pressure decrease. Marijuana can cause the heart beat to increase
by 20 to 50 beats per minute. The heart beat can increase even
more if other drugs are used at the same time. Because of the lower
blood pressure and higher heart rate, users' risk for a heart attack
is four times higher than when not smoking.
P6 Even though some people use marijuana as medicine, it has
very harmful effects on the lungs, brain, heart and reproductive
system. It’s dangerous chemicals can lead to lung cancer. They
prevent teens from fully developing their brains and increase the
risk of mental illness. They cause the reproductive system in both
men and women not to function or work effectively. Marijuana users
are also at high risk of heart attack.
1. What is the main idea of the passage?
a) Marijuana use prevents normal brain development in teens.
b) Marijuana use increase sex drive in men and women.
c) Marijuana use is very harmful to health.
d) Marijuana use can cure some serious diseases.
2. What does the word “them” in P1 refer to?
a) the dangerous chemicals
b) the lungs
c) the brain and other organs
d) other organs and the body
3. According to P3, which of the following is true?
a) Marijuana helps cure chronic cough and chest pain.
b) Marijuana smokers have difficulties in getting rid of carbon
c) Marijuana increases oxygen level in the lungs.
d) Marijuana protects the lungs from getting infection.
4. What is the main idea of P3?
a) how teens suffer from mental illness
b) how marijuana negatively affects the brain
c) how normal brain development occurs in teens
d) how marijuana controls how we think and remember
5. What can be best inferred from P3?
a) Marijuana has negative effects on learning.
b) Young adults smoke marijuana more than older adults.
c) Marijuana should be used as a remedy for brain diseases.
d) Cigarette smoking is more dangerous than marijuana smoking.
6. What is P4 mainly about?
a) Marijuana can have negative effects on the
b) Marijuana can increase sex drive and make people
enjoy sex more.
c) Marijuana negatively affects the sperm production.
d) Marijuana is harmful to women’s eggs.
7. Which of the following is not the negative effect
of marijuana in P4?
a) infertility in both men and women
b) lowered sex drive in both men and women
c) lowered testosterone levels in men
d) decreased estrogen production in women
8. Which is true of P5?
a) Marijuana can cause high blood pressure.
b) Marijuana can be used as drugs for some heart diseases.
c) Marijuana can cause the heart to beat faster than normal.
d) Marihuana can cause low blood pressure only in people with
9. What is mentioned in P6?
a) Marijuana does not cause mental illness in older adults.
b) Marijuana causes more damage to your lungs than your brain.
c) Marijuana has negative effects on fertility in both men and
d) Some medicines can prevent us from the dangerous chemicals
10. The word ‘They’ in P6 refers to_________________.
a) the dangerous chemicals
b) the lungs
c) the teens
d) the brains