4) present perfect or past simple? why? 10. you (ever / be) in a tv studio? 11. you and tom (enjoy) the party last night? 12. you (not / finish) school last year? 13. i (lose) my dictionary. i can’t find it anywhere. 14. his hair looks short. he (have) a haircut. 15. when (he / give up) smoking? 16. jane (buy) her car two weeks ago. 17. my bicycle isn’t here. somebody (take) it. 18. why (jim / not want) to play tennis last friday? 19. the car looks clean. you (wash) it? 20. when we were on holiday, the weather (be) terrible.

10 Have you ever been  есть ever а это Present Perfect
11 Did you ant Tom enjoy  есть last это Past Simple 
12 Didn't you finish есть last это Past Simple 
13 have lost  это Present Perfect это результат , нет словаря
14 has had это Present Perfect это результат, подстригся
15 did you give up это Past Simple , подразумевается ответ, где будет упомянуто точное время в
16 bought ago это Past Simple
17 has taken это Present Perfect это результат , кто-то взял
18 didn't Jim want есть last это Past Simple
19 Have you washed it? то Present Perfect это результат
20 was это Past Simple уже время есть глагол were