1. Tom wasn't hard-working enough to get good marks
2. She has long black hair.
3. My father used to smoke a lot 5 years ago but now he gives it up.
4. It is dangerous to swim across this river.
5. The blue dictionary isn't as expensive as the red dictionary.
6. Nam asked me if I could help him with his homework.
7. I haven't seen him since 1995.
8. The teacher told us not to forget to do our homework.
