III)

1 . T ( Dẫn chứng : We are having a wonderful time in USA )

2 . F ( Dẫn chứng : The weather has been warm and sunny `->` Not awful )

3 . T ( Dẫn chứng : I bought a lot of souvenirs = presents for my children )

4 . T ( Dẫn chứng : Câu cuối bài )

IV)

1 . Laser was invented by Gorden Gould in 1958

2 . That chair is not safe enough for us to stand on 

3 . We have worked here for three years

4 . Harry left early so as not to miss the last train

5 . Sue went shopping in order to buy herself a new television set yet

6 . Will you please sing that song again ?

7 . Would you mind telling me the way to Nguyen Huu Tho school

8 . He wasn't helped with his homework

1. Laser was invented by Gorden Gould in 1958

2. That chair is not safe to stand on

3. We have worked here for three years

4. Harry left early so as not to miss the last train 

5. Sue went shopping in order to buy herself a new television set

6. Will you sing that song again?

7. Would you mind telling me the way to Nguyen Huu Tho school?

8. He wasn't helped with his homework.