Bài 1:
1. Two years ago, she _taught_ at a village school.
2. We _will travel_ to Ha Noi next week.
3. He _is doing_ his homework at the moment.
4. We _didn't do_ our homework yesterday.
5. He _sent_ a letter to his pen pal last week.
Bài 2: 
1. driving
2. ten-chapter
3. a little
4. twice
2. hundred
p/s: không chắc lắm hi`