1 My favorite room is my bedroom

=>i like my bedroom best.

2 Are ther 40 students in your school

=> does your class have 40 students

3 my school has a computer room

=> there is a computer room in my school.

4 I don't have a bookself in my bedroom

=>there isn't a bookself in my bedroom.

5 His house is near the hospital

=>there is a hospital near his house.

6 it is 3 years since i last saw Nam

=>i haven't seen Nam for 3 years.

7 We started living here 50 years ago

=> we have lived here for 50 years.

8 the last time she visited me was 55 months ago

=>she hasn't visited me for 55 months .

9 I last wrote to my uncle in July

=>I haven't written to my uncle since July.

10 it it a long time since we became close friends