Sure, here are the completed sentences:

1. The last time it rained here was two weeks ago.
→ It **hasn't rained here for two weeks.**

2. Vietnamese students continue to wear jeans for best choice.
→ Jeans **are still the best choice for Vietnamese students.**

3. Nam usually gets up early.
→ Nam is **used to getting up early.**

4. I'm sorry that I don't have her phone number.
→ I wish I **had her phone number.**

5. My brother and I have never been to Da Lat before.
→ Neither **my brother nor I have been to Da Lat before.**

6. They think that the accident was caused by human error.
→ The accident **is thought to have been caused by human error.**

7. Lan hasn't visited Hanoi for 2 years.
→ It is **2 years since Lan visited Hanoi.**

8. Unless you hurry, you will miss the train.
→ If **you don't hurry, you will miss the train.**

9. I'm really interested in cycling around our town.
→ I find cycling **around our town really interesting.**

10. "Take your time and don't waste it uselessly," said the doctor.
→ The doctor advised me **to take my time and not waste it uselessly.**