Cho dạng đúng của động từ trong ngoặc
1) I ....... ( not see) him since lát last Christmas
6) Howlong ..........( you say ) in this hotel? Since yesterday
7) Lasr week we ( partipate ) in a Y&Y activity to elp me old in the rest home
8)Our school ..... ( open) a new club next week !
5) My father .......... ( go ) to HCM city on business for two days