Ex 4:Rewrite these sentences using the present perfect tense
1. I (study) medicine for/since two years but then I stopped
2. John (work) in the restaurant for/since six months but then it closed
3. I (live) here for/since I was a little girl
4. He (be) in the prison now for/since three years
5. Nga (work) in a company for/since she left school
6. I (not see) him for/since he left the office
7. We (be) in Italy for/since 1960
Ex 6: Choose the word which has a different stress pattern from the others. Circle A, B, or C.
1. A. visual B. thermal C. pollute
2. A. medical B. electric C. botanic
3. A. chemical B. specific C. national
4. A. dramatic B. logical C. continue
5. A. dynamic B. festival C. illegal
Ex 7: Choose the best option to complete each sentence. Circle A, B, or C.
1. Environmental pollution has ___________ to lots of health problems.
A. caused B. led C. made
2. ___________ industrial waste, many fish cannot survive.
A. Because B. Since C. Because of
3. Oil spills from cargos and ships have ___________ many animals and plants die.
A. made B. caused C. resulted
4. This film is rated 18+ because there are too many ___________ scenes.
A. funny B. violent C. entertaining
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Sinh Học lớp 12
