1, By 1877 the first telephone was in commercial use.

2.Tom and Peter went to France last summer.

3. We haven't seen each other for 10 years. 

4.  He graduated from the university in 1989.

5. Hoa got good mark in Maths, English Literature last week.

6. He often spends his free time improving his English speaking.

7. My mother asks me to try to study harder this semester.

8. His brother used to stay up late when he was a child

9. My family was here since Christmas.

10. Her father has worked at this bank for a long time.

1. The first telephone was used in commercial in 1877 2. Tom and Peter went to France last summer 3. We haven't seen each other for ten years 4. He gratituded from the university in 1989 5. Hoa got good masks in Math, English and Literature last week 6. He often spends his free time improving his English speaking 7. My mother asked me to try to study hard this semester 8. His brother used to stay up late when he was a child 9. My family has been here since Christmas 10. Her father has worked at this bank for a long rime