B4

Warning labels were adopted in the late 1960’s with a minor note saying ‘Smoking can be hazardous to health’. It was only the 1970’s that confirmed: smoking could kill.
(past simple passive, т.к. действие произошло в определённый момент в прошлом. Они были адаптированы)

ADOPT

B5

Smoking is a habit that people are not ready to quit even when they are dying. This is because cigarette smoking leads to a rapid addiction for nicotine and is even more addictive than alcohol.
(степень сравнения)

ADDICTIVE

B6

A person who has just started to smoke knows that he is entering a dark road.
(present perfect, т.к. действие только что началось, и ещё не закончилось)

JUST

START

B7

So, if his first experience is not good he may read the warning label on the cigarette box and decide to not smoke again.
(первый)

ONE

B8

However, if smoking is a habit, a smoker does not care about the side effects of smoking.
(present simple, т.к. это общее утверждение)

NOT CARE

B9

Although he knows that smoking is injurious, he thinks that it will not harm him very soon. So he ignores the warning labels and continues smoking.
(future, не принесёт ему вреда)

NOT HARM

B10

As a rule heavy smokers don’t really care about themselves, because if they did, they would not be smoking in the fist place.
(2й conditional)

DO