1.Most of the earth's surface ………………...(cover) by water.
2.The first festival(hold) ......... nearly eight hundred years ago.
3.There's someone behind us. I think we……………………. (follow)
 4.This bike…………………… (use) for more than six years.
5.The Eiffel Tower is in Paris. It …………………..(visit) by million people every year.
6.Tet holiday in Vietnam …………………..(celebrate) around January and Februar
 7.He should know how …………………(use) the lift, but if he doesn't you'd better……………….. (show) him
 8.He ………………..(allow) …………………..(open) a new restaurant on the main road by the city council.
 9.Please go on……………… (write) ; I don’t mind(wait) ………
 10.I advised her (ask) ............ the conductor to tell her where…………….. (get off)
 11.Her grandfather ……….(die) 20 years ago. She ……………………….(never meet) him.
 12.All students objected to …………………..(do) that work.
13.You should practice ……………………….(speak) English everyday.
14. After ……………..(spend) two days………….. (argue) about where to go for their holidays.
15.They decided……………… (not go) to the cinema.
16.I was just about………………….. (leave) the office when the phone rang.
 17.It would be not good ………………(ask) Tom …………………….(do) that work.
 18. I saw Paul …………………….(watch) television when came to see him.
19.There is no point in……………………………. (arrive) half an hour early.