.Нужно вставить learn , або study Choose learn or study to complete the sentences. 1) He's trying to … French. 2) Speaking English, we … new things 3) Susan … to be a policewoman by watching the work of her more experienced colleagues. 4) My brother has just … a new song. He’s going to sing it at the school concert. 5) I carefully … the text of the letter before answering it. 6) If you want to … Physics seriously, think about going to university. 7) Helen’s dream is to … Mathematics at one of the best universities. 8) Where did you … to dance so well? 9) Do you find it easy to … new Spanish words? 10) Try to … more about the English language and how to use it.

1)study

2)learn

3)learn

4)learn

5)learn

6)study

7)study

8)study

9)learn

10)learn

ответ: Ex.21

1)Does his father work at our university?

2)Do the wolves eat animals?

3)Does this train arrive at 2p.m. every day?

4)Does her mother grow fuchsias in her garden?

5)Do I never bully my little sister?

6)Does Mrs. Blake bake cakes on Saturdays?

7)Do we always train in this gymnasium?

8)Does Bob usually skate at this skating-rink?

9)Does Ron play hockey every other day?

10)Does Sally frie fist on Fridays?

11)Do our children always drink orange juice in the morning?

12)Does Mr. Clinton repair his house every ten years?

13)Do we clean our flat every weekend?

14)Does mother catch lick her kittens every day?

15)Does that farmer feed pigs and cow three times a day?

Ex.22

1)John doesn't train here every morning

2)Mother doesn't wake me up every day

3)This actress doesn't perform wonderfully

4)We don't see swallows high up in the sky

5)This pupil doesn't always ask a lot of questions

6)They don't write tests every week

7)Ann doesn't speak Japanese fluently

8)My father doesn't redecorate the house every five years

9)Toby doesn't run in the nearest park every morning

10)The children don't miss their mother

11)We don't cash out checks in this bank

12)They don't use their credit cards everywhere

13)This surgeon doesn't operate three days a week

14)My husband doesn't shave every day

15)These puppies don't chew everything in the house.

Объяснение:

1. The fuselage is not the central body of the airplane. (negative)

Is the fuselage the central body of the airplane? (interrogative)

2. We don't divide the aeroplane into five principal structural units. (negative)

Do you/we divide the aeroplane into five principal structural units? (interrogative)

3. The power plant doesn't provide power for flight. (negative)

Does the power plant provide power for flight? (interrogative)

4. The tail unit doesn't consist of two surfaces, vertical and horizontal. (negative)

Does the tail unit consist of two surfaces, vertical and horizontal? (interrogative)

5. The wing doesn't extend equally on each side of the fuselage. (negative)

Does the wing extend equally on each side of the fuselage? (interrogative)