Вставить предлоги. Урок английского языка для начинающих

1. They are interested biology.

2. I like to travel summer.

3. Please keep the line free four five.

4. I often go abroad business.

5. Please write your date birth, too.

6. I'm sure the date, but I'm not sure the time.

7. My mail isn't my table yet. It's late.

8. "Isn't model 17 Sam's lab?" "No, it's still my lab."

9. "Is Jane still college?" "Yes, she's a technical college London."

10. You can leave him a message his office.