1. studied

2. have studied

3. have never watched

4. watched

5. have travelled

6. travelled

7. have read

8. read

9. had

10. have had

1. Our school yard has many flowers

2. I have taught in this school since 1999

3. The last time she saw him was 2 weeks ago

4. My house has a living room, two bedrooms and a kitchen

5. The Nile is the longest river in the world

6. Your room is larger than my room

7. We must finish our homework before going to class

8. Who is the owner of this book?

It was such an interesting book. I read it many times / It was such an interesting book that I read it many times

1. are being told

2. are now held

3. are scheduled

4. have already populated

5. will be transfered

đề bài đâu ạ?

should be treated with respect by children

was

bài này là điền prepositions chung thôi chứ riêng in, on, at không đủ á.

1. in

2. on

3. between

4. in front

5. in

6. front of

7. on - in

8. on

7A 8B 9C 10A 11B 12D