Ex2: Điền dạng đúng của động từ tobe : am, is, are, was, were :
1. The homework .......... very difficult yesterday.
2. The children ........... in the park five minutes ago.
3. Nha Trang ......... a beautiful place.
4. I ........ late for school yesterday.
5. Where ........ she yesterday? -She ........ at home.
6. We .......... tired today. We .......... at the party last night.
7. She .......... unhappy because she doesn't have any friends in the city.
8. .............. you at home yesterday morning ?
1. The homework was very difficult yesterday.
2. The children were in the park five minutes ago.
3. Nha Trang is a beautiful place.
4. I was late for school yesterday.
5. Where was she yesterday? -She was at home.
6. We are tired today. We were at the party last night.
7. She is unhappy because she doesn't have any friends in the city.
8. Were you at home yesterday morning ?
Chúc bạn học tốt 
1. The homework .....was..... very difficult yesterday.
2. The children .....were...... in the park five minutes ago.
3. Nha Trang .....is.... a beautiful place.
4. I ...was..... late for school yesterday.
5. Where ..was...... she yesterday? -She ....was.... at home.
6. We ......are.... tired today. We ...were....... at the party last night.
7. She .....is..... unhappy because she doesn't have any friends in the city.
8. ......Was........ you at home yesterday morning ?
1. The homework .....was..... very difficult yesterday.
2. The children .....were...... in the park five minutes ago.
3. Nha Trang .....is.... a beautiful place.
4. I ...was..... late for school yesterday.
5. Where ..was...... she yesterday? -She ....was.... at home.
6. We ......are.... tired today. We ...were....... at the party last night.
7. She .....is..... unhappy because she doesn't have any friends in the city.
8. ......Was........ you at home yesterday morning ?
