1. Some of my classmates assignment on energy storage and had to do it again. Understood 2. Access to the science club is strictly prohibited to .Members
3. Experts are trying to -the life of lead batteries. Length

1.they are in the school, aren't they?  

2.they aren't at home? are they?  

3.they do exercises, don't they?  

4.she can sing, can't she?  

5.he doesn't like soup, does he?  

6.there are a little bear, aren't there?  

7.it is a cake, ian't it?  

8.you will go to the cinema, won't you?  

9.you can't swim, can you?  

1. john often goes to the theatre on sundays.

2. they usually go to the park twice a week.

3. how often do you play baseball?

1.the solar sail will destroy the asteroid.

the solar sail won't destroy the asteroid.

will the solar sail  destroy the asteroid?

2.we'll be able to have holidays in space soon.

we won't  be able to have holidays in space soon.

will we  be able to have holidays in space soon?

3.they're going to send a manned spaceship to mars.

they aren't going to send a manned spaceship to mars.

are they going to send a manned spaceship to mars?

4.mark is going to be an astronomer.

mark isn't going to be an astronomer.

is mark going to be an astronomer?

5.you'll have to wear a spacesuit.

you won't have to wear a spacesuit.

will you have to wear a spacesuit?

1.what are you doing? -i am looking for my book. что ты делаешь? я ищу свою книгу.

2.i like granny pasha very much.she looked after me when i was a child. я люблю свою бабушкупашу. она присматривала за мной, когда я был(была) ребёнком.

3.if like don`t know the word,you should look it up in a dictionary. если ты не знаешь слово, ты должен посмотреть его в словаре.

4.don`t look at her.she`s crying. не смотри на нее. она плачет.