Change the words in bold in the conversation in Exercise 4. Use the
information on the cards. Practise the

. i have not worked today. 2. we have bought a new lamp. 3. we have not planned our holiday yet. 4. where have you been? 5. he has written five letters. 6. she has not seen him for a long time. 7. have you been at school? 8. school has not started yet. 9. has he spoken to his boss? 10. no, he has not the time yet. 11. betty has spent 200 euros at the shopping mall.

отмечай мне "лучшее решение", если несложно, просто кликом.

1)мы знаем,что он работает над проблемой космической связи. 2)если вы совершите,даже малейшую ошибку на компьютерном языке, разговор не получится, и вы обязаны начать с заново.3)читальный зал библиотеки конгресса занимает большая коллекция справочников.

cat: on average, cats spend 2/3 of every day sleeping.  cats make about 100 different sounds.  a cat can jump up to five times its own height in a single bound.

cow:   a cow can’t produce milk until she has had a calf.  there are about 920 different breeds of cows in the world.  cows can live 25 years.

dog:   a dog, named laika, was the first in space in 1957.  nose prints are used to identify dogs, just like humans use fingerprints. a    dog's smell is estimated at 1 million times better than humans.

hamster:   hamsters can travel about 8 miles in search of food.  hamsters react to their names.  hamsters are color blind.

giraffe:   giraffes drink large quantities of water when it is available enabling them to live for long periods in arid areas. coat of giraffes is made up of brown patches of hair separated by lighter hair. each giraffe has a unique coat pattern.

guinea pigs: guinea pigs are born with fur and with their eyes open.  guinea pigs need to gnaw to wear down their teeth. 

duck:   when ducks quack they have no echo.  some ducks can fly about 332 miles a day.  ducks have webbed feet, which act like paddles.

koala:   koalas sleep for up to 18 hours a day.  koalas very rarely have twins.baby koalas are called ‘joeys’.

rabbit:   rabbits have 28 teeth.  rabbits do not hibernate.  rabbits can jump 36″ and higher.

seahorse:  

seahorses have no teeth and swallow their food whole.  a male seahorse becomes pregnant when a female deposits her eggs into his pouch.  there are approximately 35 known seahorse species.

hedgehog:   hedgehogs are solitary animals.  the average lifespan of a hedgehog is 3.5 years. some hedgehogs can live up to 9 years.  hedgehogs curl into a prickly ball when attacked.

frogs: absorb water through their skin so they don't need to drink.  frogs can lay as many as 4,000 eggs in frogspawn.  the eyes and nose of a frog are on top of its head so it can breathe and see when most of its body is under the water.  frogs need both water and land to live.