Exercise 5. вставьте пропущенные слова: another important function of the kidney is to maintain the … balance of water, salt and acid in the body fluids. the brain is the … center for regulating and coordinating body activities. respiration is the … process of breathing. the blood and lymphatic systems have many … . joints are the places where … come together. the endocrine system is composed of … located in different regions of the body.
2. Whatever you do, you mustn't touch that switch. It`s very dangerous.
3. You mustn't forget what I told you. It`s very important.
4. We don't have to leave yet. We`ve got plenty of time.
5. Ann was feeling ill last night. She had to leave the party early.
6. I had to go to the bank yesterday to get some money.
7. The windows are very dirty. I must clean them.
8. The windows aren`t dirty. You don't have to clean them.
9. We arrived home very late last night. We had to wait half an hour for a taxi.
10. These cakes are very nice. You must have one.
11. We don't have to take an umbrella. It`s not going to rain.
2) Bob a)helped his father.
3) The girls c)skipped in the park.
4) My sister b)studied English last year.
5) Did you walk in the park a)yesterday?
6) What game c)did you play yesterday?
7) Tom c)tried to play tennis.
8) We b)ate porridge yesterday.
9) Mother a)bought some bread.
10) l b)did my homework yesterday.
1) l c)saw a nice picture yesterday.
2) Bob c)didn't go to school last week.
3) Tom a)got a present yesterday.
4) Did you b)read this book last year?
5) l didn't c)hear your song.
6) Mary b)sang this song at the party.
7) Granny a)wrote a letter to us last week.
8) l c)didn't drink my juice yesterday.
9) Did you b) sleep well last night?
10) Why b) did you buy this bag?