1. Miss Lee often (write)     when he (be)     young.

2. He (leave)    home two weeks ago

3. You (speak)      to Mrs. Bakers yesterday?

4. Columbus (discover)    America more than 400 years ago.

5. I (not can) remember when I last (see)     her.

6. When Nguyen Du (die)     ? - I (not know)      when he (die )        .

7. Hurry up! The train (come)   .

8. Be quiet! The teacher (be)       angry.

9. Some animals (not eat)     during winter.

10. Listen! The bird (sing)       .