Можете ? use present perfect or past simple of the verbs given in brackets: 1) a: why aren’t you doing your homework? b: i can’t do it. i (leave) my books at school. 2) a: you ever (be) to america? b: yes, i i (be) there twice. a: when you (be) there? b: for the first time a (be) there in 1998. 3) a: there isn’t any milk left. we (drink) it. b: i can’ believe it. yesterday i (buy) 3 litres. 4) a: they haven’t got a car any more. they (sell) it. b: when they (do) it? 5) a: you (find) your pen? b: yes, i i (find) it last tuesday.

1) A: Why aren’t you doing your homework?
B: I can’t do it. I left my books at school.
2) A: Have you ever been to America?
B: Yes, I have. I have been there twice.
A: When were you there?
B: For the first time a was there in 1998.
3) A: There isn’t any milk left. We have drunk it.
B: I can’ believe it. Yesterday I bought 3 litres.
4) A: They haven’t got a car any more. They have sold it.
B: When did they do it?
5) A: Have you found your pen?
B: Yes, I have. I found it last Tuesday.

I Мне кажется все варианты А кроме 4 (не знаю) ведь Present perfect - настоящее совершенное время, обозначает действие, которое совершено в но его результат связан с настоящим.
II
1. Has he travelled the world? He hasn’t travelled the world.
2. Has Margaret gone to Thailand? Margaret hasn’t gone to Thailand.
3. Have we seen famous sights? We havn’t seen famous sights.
4. Has she bought souvenirs for her friends and family? She hasn’t bought souvenirs for her friends and family.
5. Have students been here since 8 o’clock? Students havn’t been here since 8 o’clock.  
III Какие слова выделенные?
IV Тут могу ошибаться:
1. с возможно в
2. в точно не с
3. с
4.с
5. c точно не в
6. а
7. с
8. с точно не в
9. в
10. а
11. в
12. а
13. с
14. с
15. в

1. I did not see my friend Mike last summer. Actually, I did not see him since we leftschool. 
2. You saw Liza in the last few days? – No, but I have seen her today. We are going outfor dinner.
3. You ever was to South America? – Yes, I‟ve been there several times. – Whenyou last went there? – A couple of months ago. I sometimes go there on business.
 4. Elmer took hundreds of pictures when he was in Europe.
5. Helen was here earlier but I think now she already left. She usually leaves theoffice at 5 o'clock.
6.  Patrick left the party early because he was sick.
7. –You ever ride a camel? – Yes, I rode a camel when I was in Egypt last year.
8. Erick had a lot of free time since he moved to Thailand.
9. Bob visited the White House when he was in Washington.
10. I was to the supermarket. Look, Ive bought a lot of things.

1. Alice visited more countries than she can count.
2. I live  in my hometown all my life.
3. We saw many interesting sights in the last few days.
4. Kate no found a new job yet.
5.  Molly has eaten three pieces of cake today.