. Put questions to the following sentences. 1. He will be busy with his research work. (general)
2. The scientists obtained new laboratory equipment. (What)
3. You must switch on the apparatus in time. (When)
4. We were taught how to handle these instruments. (Who)
5. The students have to study a lot of material. (Why)

3. Open the brackets.
1. The engine (not to function). It must (to repair).
2. We (to repeat) the experiment next month.
3. Our engineers (to put) the engine in motion yesterday.
4. They (to report) on the results of their observations by 10 o’clock
tomorrow.
5. This area (to explore) by the scientists for several months last year

1) I have already tidied up my room

2) She has never eaten candyfloss

3) He has just gone souvenir shopping

4) We have not read this book yet

5) They have travelled Europe 3 times

Объяснение:

Ex 3

Have you just arrived?

She hasn't pack her suitcase yet

I have been to an adventure camp before

Have you ever shaken hands with cartoon characters?

I have never seen a robot

Ex 4

есть сладкую вату

заниматься покупками сувениров

Отправляться в полет в пиратское путешествие

осматривать знаменитые достопримечательности

жать руки героям мультфильмов

исследовать дом, населенный привидениями

кататься на американских горках

Упр 1

1) has finished

2) has scored

3) have watched

4) has run

5) has bought

6) have lost

7) has written

8) have eaten

9) have watched

10) have started

Dear "Имя",

I haven't heard from you in a long while and I thought I should give you an update about my home duties, so maybe you can reply and tell me about yours. I have a lot of home duties because my Mom and Dad are currently on a vacation in San Francisco, so the house is on me completly. Every day when i wake up i clean our kitten's toilet and feed it. Then, i usually do some vacuum cleaning and washing dishes. When i'm finally done, i go out to see Chrisitne and some other friends. What's your home duties, "Имя"?

Waiting for your response.

Sincirely, "Имя автора письма".