I. Chia động từ trong ngoặc
1.While my sister and I ( watch) a movie on TV last night, our uncle in the USA (phone)
2.Please,continue your work, we don't mind (wait)
3.Most of the Earth's suface ( cover) by water
4. The flim(start) at 7.15 p.m
5.If Mr.Lam (go) to Paris next week, he (see) Eiffel Tower
6.I (save) for two years. I (save) 100 dollars
7.Many lakes and rives (destroy) by pollution from factories at present
8.My uncle (not visit) us since he (move) to the new town
9.It (get) hotter and hotter in June
10.Last night when we (visit) him, he (do) an experiment on the upstairs
11.The sewing machine which you (use) at present (invent) in 1980 by a French