Chia dạng đúng của từ

20.He(work).....................for that company for 5 years.
21.I (graduate)..........................from Hue University last year.
22.Tom (play)..............football every afternoon.
23.I(cook).................in the kitchen when he came in.
24.Mai (attend)...................the meeting at the moment.
25.I (help)......................him whenever he needs.
26.She told me how(make)...........................the cake.
27.The man(stand)....................near the door is my brother.
28.Do you mind(tell)....................me her address?
29.My father decided(go)...................abroad.
30.Could you please tell me where(buy).....................this book?