Помогите плииииз!!!Срочно!! В данных предложениях измените время глагола на Present Perfect,сделав необходимые добавления. 1.The boys are going to take an Adventure Holiday this year. 2.Victor was in the Caucasus last summer and went rock climbing there. 3.We discover new places when we travel much. 4.I think that many of the teenagers who like to travel prefer hiking 5.Mr.Green and his family are crossing the Atlantic Ocean

1. have been going (не знаю как поменять)
2. has been..previous summer and has gone 
3. have discovered.. we have traveled 
4. have thinked.. have liked 
5. have been crossing