III. Chia động từ trong ngoặc ở thì hiện tại hoàn thành
12. I (just/ see)….. have just seen ..…. Andrew and he says he …had…..already (do)…done…. about half of the plan.
13. I … have …..just (decide)… decided … to start working next week.
14. He (be)……has been……. at his computer for seven hours.
15. She (not/have) ……… hasn't had ……any fun a long time.
16. My father (not/ play)… hasn't played ….. any sport since last year.
17. I’d better have a shower. I (not/have)…haven't had…. one since Thursday