- Choose the correct form of the verb: use simple present and simple past ( do not use contractions)
1. I wanted to do that last Monday ( want)
2.You were there, I saw you ( see)
3. Lis is 5 years old now. ( be)
4. Does she like chocolate? ( like)
5. Sarahi does not answer the questions yesterday. ( not — answer)
6.Daniela did not break up with him last week ( not- break up)
7.Did she have a dog last month? ( she — have )
8. It was hot in the room, so I opened the window ( open)
9. The film was very long, it started at 7:15 and finished at 10:00( start)
10. You travel around the world every year ( travel )
11. Does he hate me? ( hate )
12. The accident happened last Sunday ( happen)
13. Roberth does not like maths ( not- like)
14. Anna’s grandfather died when he was 90 years old ( die)
15. They enjoy their free time last weekend. ( enjoy)
16. Last year, we enjoyed our free time ( enjoy)
17. Jessica went to the concert last weekend ( go)
18. Paul and Cris always chat in the classroom ( chat)
19. Rocio runs fast. He is one of the best runners in the world. ( run)
20 .My friend goes to the supermarket every day ( go)
2) Complete the following sentences using an appropriate present continuous or past continuous tense form.
1. I was watering the plants in the morning.
2. What were you doing at 6 o’clock yesterday evening?
3. They were waiting for the bus when the accident happened.
4. She is getting impatient.
5. The boys are playing in the garden.
6. It is raining cats and dogs.
7. I am revising my lessons now.
8. Somebody is knocking at the door.
9. We are waiting for the guests to turn up.
10. The students are shouting slogans outside the campus.
11. The birds are flying in the sky.
12. John and Sandra are expecting their first child.
3) Complete the sentences with Present Perfect tense
- She has finished the bird house today. (to finish)
- We have not translated the whole text yet. (not / to translate)
- Haveyou ever been to Rome? (to be)
- Where have you been lately? (to be)
- He has locked the door. (to lock)
- I have not heard from you for ages. (not / to hear)
- Tom has already graduated from university. (to graduate)
- Have the children prepared the concert? (to prepare for)
- What has Kate eaten for breakfast today? (to eat)
- They have watched an interesting program this week. (to watch)
- He has not ate an ice-cream since August. (not / to eat)
- We have found the way. (to find)
- How has he spent all of his money? (to spend)
- Jim and Jill have answered the question right. (to answer)
- Rachel has not talked him since Friday. (not / to talk to)
- Have You lost your mind? (to lose)
- What has your mother baked for your birthday? (to bake)
- Has he ever been to Niagara Falls? (to be)
- They have not received any answer yet. (not / to receive)
- Where have you been this year? (to be)
Choose present perfect simple or continuous
- Have they arrived already?
- Lucy has run 2000 metres today.
- I’ve been cleaning all morning – I’m fed up!
- How long have you known Simon?
- I’ve been drinking more water lately, and I feel better.
- Sorry about the mess! I’ve been baking.
- How many times have you taken this exam?
- He has eaten six bars of chocolate today!
- Julie has cooked dinner. Let’s go and eat!
- The students have finished their exams. They’re very happy.
- The baby’s face is really dirty! What has he been eating?
- Iona is exhausted these days. She has been working too hard recently.
- Luke has never been abroad.
- I’ve been waiting for three hours already !
- Have you finished your homework yet?
- How long have you been a lawyer?
- I’ve been reading your book all day. It’s very interesting, but I’m only on
chapter 2. - She has drunk ten glasses of water!
- I’ve had my dog for sixteen years.
- Help, I’ve lost my wallet! How can I get home?
и уточнение его значения шли параллельно с развитием всей математики и занимают несколько тысячелетий. Древние цивилизации, включая египтян и вавилонян, требовали довольно точных приближений π для практических вычислений.Как и все иррациональные числа, π не может быть представлен как обычная дробь (также известная как простая или вульгарная дробь). Известно, что π-трансцендентное число. Трансцендентность π подразумевает, что невозможно решить древнюю задачу возведения круга в квадрат с помощью циркуля и линейки. Мировой рекорд по запоминанию знаков числа π принадлежит японцу Акира Харагути (Akira Haraguchi). Он запомнил число π до 100-тысячного знака после запятой. Ему понадобилось почти 16 часов, чтобы назвать всё число целиком. (на запоминание ушло 10 лет).