Chia động từ đúng trong ngoặc. He ( work ) at this restaurant seven years ago

6. He ( work ) at this restaurant seven years ago 
7. this is the first time , I (play ) tennis 
8. I (wash ) the dishes when the light ( go ) out last night 
9. How aften ( she/meet ) her dentist? 
10. He ( be come ) a famous writer when he ( be) 30