B. Put the verbs in brackets in the correct form to complete the sentences in Present Perfect. 6. Have your parents ever …… (go) on a rollercoaster ride?
7. They have …… (explore) the cave twice, but haven’t found any signs of pre-historic human activity there.
8. I haven’t …… (be) to Adventure camp yet.
9. She has never …… (perform) in a concert before.
10. Have you …… (taste) our homemade jam?