PRESENT PERFECT (hiện tại hoàn thành)

1. I ____ this washing machine for five years now. It looks old, but it still works well. A. have B. had C. is having D. have had

2. Have you ever read the Wuthering Heights? - Oh. That's my favourite. I ____ it many times, at least four. A. read B. have read C. was reading D. used to read

3. People's lives ____ a lot thanks to the inventions of these devices. A. was changed B. has been changed C. have changed D. is changed

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