Complete the sentences with the Present Perfect form of the verbs in brackets.
1. He (not call) his friend. 2. John (write) a letter to his sister. 3. The children (clean) the forest. 4. She (not walk) the dog. 5. They (buy) a new computer. 6. I (leave) the book at home.
1. hasn't called
2. has written
3. have cleaned
4. has walked
5. have bought
6. have left
Объяснение: