помогите пожалуйста с тестом!!

Выберите правильный вариант предложения, переведите предложения
1.а) I am a teacher since I left university.
b) I have been a teacher since I left university.
2.a) I went to Bristol University in 1994.
b) I have been to Bristol University in 1994.
3.a) We have studied English since three years.
b) We have studied English for three years.

Заполните пропуски в предложениях следующими выражениями have to, don’t have to, should, shouldn’t, переведите предложения
1.You … wear your seat belt all the time. You can take it off.
2.But you … wear it at take-off and landing.
3.You … drink too much alcohol because you might be ill.
4.There is often a film on a long flight, but you … watch it. You can go to sleep.
5.When you’ve got your laggage, you … go through Customs.

Поставьте слова в правильном порядке, переведите предложения
1.you/ feel/ stop/ better/ if/ will/ you/ smoking
2.car/ Peter/ enough/ when/ he/ buy/ a/ has/ will/ money
3.problem/ help/ I/ you/ have/ you/ a/ will/ if