V. Some of the following lines are incorrect: they have a word which should not be there. If a line is correct, put a tick (); if a line has a mistak

V. Some of the following lines are incorrect: they have a word which should not be there. If a line is correct, put a tick (); if a line has a mistake, underline and write the incorrect word. (10 pts)

Most people know that cigarette smoking is do harmful to their health. Scientific research shows that it can cause many other kinds of diseases. In fact, many people who smoke get lung cancer. Doctors believe in that it may also cause lung cancer in people who do not smoke. Nonsmokers often breathe in the smoke from other people’s cigarettes. This is a secondhand smoking. People are becoming very aware of the danger of secondhand smoke. As a result, they have passed laws that prohibit their people from smoking in many public places. Besides, many governments tend to put taxes on cigarettes to discourage people out from smoking. With all the concerted efforts made by the authority and nonsmokers, we can be look forward to a world without smoking.
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