Grade 8 Unit 2 Topic 2 Section D

Some people think that smoking___________(must/can) help him relax. In fact, smoking is really_______(healthy/unhealthy). Do you know that there_________(is/ are) over 4 000 chemicals in cigarettes? These chemicals are______(good/bad) for our bodies. They________(must/can) cause cancer and other diseases.
The smoke from cigarettes harms__________(only/not only) smokers but other people. It’s called “second-hand smoke” and it __________(can/can’t) be more dangerous and has higher risks. Smokers shouldn’t use smoking to help them relax. They _______ (must/mustn’t)  give up smoking as soon as possible.

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