Put the verbs in brackets into the present perfect.
1 A: ....................... (you\ever\ride) a camel?
B No. but I (fly) on a plane.
2 A : Sarah ................. (never\ be) snorkelling.
B No, she has not but she .......................... (be) bungee jumping once.
3 A: How is your holiday? ......................... (you/ do) anything special so far.
B We .................... (swim) with dolphins and ............. (climb) up a volcano so far.