1. was

`->` DHNB: yesterday - thì QKĐ, S + was /were , The homework là danh từ số ít nên  dùng was

2. were

`->` DHNB: ago - thì QKĐ, S + was / were , children là danh từ số nhiều của child nên dùng were

3. is

`-` Thì HTĐ:S +is /am /are +adj /N

`-` Nha Trang là danh từ số ít nên dùng is

`-` Tạm dịch: Nha Trang là 1 địa điểm đẹp

4. was

`-` DHNB; yesterday - thì QKĐ, i / she /he /it +was

5. was / was

`-` DHNB: yesterday - thì QKĐ, i / she /he /it +was

6. are / were

`-` Vế 1 : HDNB: today - thì HTTD, nên dùng động từ tobe is am are ở thì HTTD, We, they , you + are

`-` Vế 2 : DHNB: last night - thì QKĐ , we , they , you + were

7. is

`-` doesn't được dùng trong động từ thường ở thì HTĐ nên vế trước because cũng chia hì HTĐ, S + is / am /are + N/adj

8. Was

`->`DHNB; yesterday - thì QKĐ, Was + i / she /he /it