C. Past Simple or Past Continuous. 1. At this time yesterday I (to sit) at the thea¬tre.
2. He (to come) back to St. Petersburg on the 15th of January.
3. I (to go) to the institute when I (to see) him.
4. At this time yesterday we (to have) dinner.
5. He (to write) a letter when I (to come) in.
6. He (to make) a report when I (to leave) the meeting.
7. Yesterday he (to write) a letter to his friend.
8. When I (to look) at them, they (to smile) at me.
9. What you (to do) at six o'clock yesterday?
10. I (to go) to bed at half past eleven.
11. Yesterday the lesson (to begin) at nine o'clock.
12. The cat (to take) a piece of fish 'and then (to run) away.
13. He (to read) a newspaper when I (to come) in.
14. Yesterday I (to get) up at seven o'clock.
15. The train (to start) at fifteen minutes to ten.
16. He (to put) on his coat and cap, (to open) the door and (to go) out.

1. At this time yesterday I was sitting at the thea¬tre.

2. He  came back to St. Petersburg on the 15th of January.

3. I was going  to the institute when I  saw him.

4. At this time yesterday we were having dinner.

5. He was writing a letter when I came in.

6. He was making a report when I left the meeting.

7. Yesterday he wrote a letter to his friend.

8. When I was  looking at them, they  smiled at me.

9. What were you doing at six o'clock yesterday?

10. I was going to bed at half past eleven.

11. Yesterday the lesson began at nine o'clock.

12. The cat was taking a piece of fish 'and then  running away.

13. He was  reading  a newspaper when I  came in.

14. Yesterday I got up at seven o'clock.

15. The train was starting at fifteen minutes to ten.

16. He  put on his coat and cap,  opened the door and  went out.

2 the

3 a 

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.