They bought this house ten years ago.→ They have

1. They bought this house ten years ago.

→ They have.........

2. Jane gave me a present on my last birthday.

→ I was.....

3. I last saw Bob when I was in Ho Chi Minh City.

→ I haven't seen.....

4. It is a three-hour drive from Hanoi to Nam Dinh. → It takes.........

5. The children couldn't go swimming because the sea was very rough.

→ The sea was too......

6. All the students love the principal because he is very kind.

→ Owing to