Exercise 4:. Cho dạng đúng của các động từ trong ngoặc ở thì hiện tại hoàn thành.
1. She (be)…………. at her computer for eight hours.
2. Hannah (not/have) ……………any fun a long time.
3. My grandfather (not/ play)……….. any sport since last year.
4. You’d better have a shower. You (not/have)………. one since Monday.
5. I don’t live with my family now and we (not/see)…………. each other for ten years.
6. I…… just (realize)…………… that there are only three weeks to the end of the semester.
7. Anna (finish) … reading three books this month.
8. How long…….. (you/know)………. each other?
9. ……….(You/ take)………… many photographs?
10. Jack (eat)………………. at the Sheraton Hotel yet?