109 Put the verbs in brackets into the correct tense. 1. Tony... bought (buy) a new shirt last Monday.
2. Ann is a teacher. She(teach) for fifteen years.
3.She(cook) lunch before the children came home.
4. How long (you / have) a driving licence?
5. She (type) some letters when the boss asked her into his office.
6. He (drive) for an hour when he reached the village.

2 Sue has a temporary job just for the summer. Tom, on the other hand, is a full time worker and is a permanent employee of J&J Construction.  
3 Although his monthly profits are not very high he gets perks like a company car. Her betting on stocks and shares is high but she hopes to gain a huge profit from them. 
4 I am planning to do an advanced training course so that I can gain more experience and get a better job that will increase my profits. He put in a lot of extra hard work when the factory was going through a bad period in order to receive admiration from his employers.

1)  Is it dangerous to use poisonous gases? Why?
I believe that it is very dangerous to use poisonous gases. Some poisonous gases harmful effect on human health. There are gases using which can destroy living organisms.
Я считаю, что это очень опасно использовать ядовитые газы. Ядовитые газы вредно влияют на здоровье человека. Есть такие газы использование которых может погубить живые организмы. 

Cl. Answer the questions. (ответьте на вопросы.) 
1) Is recycling necessary? Why?Recycling is necessary because it helps to protect the environment from rubbish and harmful substances. In addition, recycling saves forests.
Утилизация необходима, потому что она защищать окружающую среду от мусора и вредных веществ. Кроме этого, утилизация леса.
2) Is it dangerous to throw away litter? Why? It is very dangerous to throw out the litter because it can harm other people and animals. People feel unpleasant to live in a dirty town or village and animals may eat garbage by mistake and get sick.
Это очень опасно выбрасывать мусор, потому что он может навредить другим людям и животным. Людям неприятно жить в грязном городе или деревне, а животные могут по ошибке състь мусор и заболеть..