giúp mình với ạ
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**Present perfect and past simple**
VIII. Choose the correct words.
1. David **has been** / was at the beach for hours. I think he’s having a great time there.
2. **Have your friends bought** / Did your friends buy tickets for the concert yesterday?
3. My younger sister **has started** / started school six months ago.
4. So far this week we’ve **seen** / saw two funny films on TV.
5. I’ve **talked** / talked to my grandparents on the phone last week.
6. What’s the noise? **Have your neighbours bought** / Did your neighbours buy a new dog recently?
7. **Have you seen** / Did you see Nick this week?
8. We’ve **known** / We knew Ann and Tom for three years. We’re really good friends now.