Chia động từ trong ngoặc

11.Hoa (visit)..................her parents once a year.
12.................Nam(go)................to West Lake Park on his birday?
13.What ...........you(do)............on your birthday?
14.Hoa and Linh often(play).......................badminton after class.
15.Many people in the countryside still (work)...................seven days a week.
16.Mai still in her room.She(iron).....................her clothesfor next week.
17.The street (become)...........................very crowded after 5 p.m every day.
18.She (come)................ to France 2 years ago.
19.I(just send).................... a letter.
20.He(work).....................for that company for 5 years.