1. Andy and I (know) each other since we (meet) in a summer camp four years ago. 2. The children (watch) television for two hours. I (think) it's more than enough. 3. How long (you, learn) to play the piano? When (you, begin) ? 4. Peter (phone) just now. He says he (buy) food at 5 o'clock yesterday. 5. I see that your hair is wet. (You, swim) ? (You, enjoy) it. 6. Would you like a piece of cake? I (just, make) it. I will make such a cake for you if you (say) that you like it.

Part II: Fill in the gaps with the correct verb forms.

1. Andy and I have known each other since we met in a summer camp four years ago.
2. The children watched television for two hours. I think it's more than enough.
3. How long have you been learning to play the piano? When did you begin?
4. Peter phoned just now. He says he bought food at 5 o'clock yesterday.
5. I see that your hair is wet. Have you been swimming? Did you enjoy it.
6. Would you like a piece of cake? I have just made it. I will make such a cake for you if you say that you like it.