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1. His teacher wishes his lessons were prepared before he went to class.
2. Nga's mother asked her where she was then.
3. He hasn't seen his grandfather for 2 years, has he?
4. Because she was tired, she didn't go to school.
5. The weather was bad, so we couldn't go on a picnic.
6. Trung said that he liked watching documentaries.
7. The last time I wrote to her was two years ago.
8. I wish a new mall were built here.
9. It rained heavily, so Lan couldn't go to school.
10. If you don't practice speaking English every day, you can't improve your English.
11. Mr.Brown asked me if I went to school by bicycle.
12. She hasn't been seen for 20 minutes.
13. She wishes she could speak English fluently.
14. Nga said that she liked watching foreign films.
15. The first TV picture was produced by Baird in 1926, wasn't it?
16. If you listen to your teacher's instructions carefully, you can understand lessons better.