Період піврозпаду ізотопу Цезію ( 137/55 Cs) дорівнює 30 рокам. Визначте, скільки
відсотків атомів цього ізотопу розпадеться за 150 років.​

Dear Andy,I want to tell you about the city I live in. It is the best city in the world. There are a lot of interesting places in it. There are lot of  1) museums, 2) libraries, 3) theatres, and 4) cinemas__ in Washington. Visit the Smithsonian!  This 5) museum _ is very big and interesting. A lot of people visit it every year. There are many  6) shops, 7) supermarkets,__ and 8) shopping centres_ in my city. You can buy many things there.  Washington has got a lot of  __ 9) cafes  and 10) restaurants__. You can have a meal there. There are many beautiful 11) parks__ in Washington. I like spending time with my friends in Rock Creek Park. I like visiting the National 12) Zoo___. It is a very big 13) zoo__. There are many animals and birds there. Washington is a fantastic place! All the best, Sam
Пропущенные слова:  1) museums,  2) libraries,  3) theatres,  4) cinemas,  5) museum  6) shops, 7) supermarkets,  8) shopping centres,  9) cafes,  10) restaurants, 11) parks,  12) zoo,  13)  zoo.

1. I am going to brush my teeth.
2  He is going to repair the car.
3. We are going to learn Greek.
4. I am going to write some postcards.
1. He is not going to help us.
2. We are not going to cook dinner tonight.
3. I am not going to celebrate my birthday this year.
4. She is not going to stay with Amy.
5. We are not going to get up early next Sunday.
1. Is Lusy  going to call a taxi?
2. Are you  going to sing a song for us?
3. Are you  going to cook dinner?
4. Is she  going to take part in the concert?
5. Are they going to leave the house?