Fill in the blanks with the correct form of the verb, given in brackets. yesterday my mum (cooked / cooking) borsch. she (takes / taking / took) two beets (буряки), seven potatoes, one carrot, some cabbage and two onions. she (peeling / peeled / peels) beats, potatoes and a carrot. then she (cut / cuts) them and the cabbage. after that she (put / putting) the vegetables into a pot and (boiled / boils / boiling) them. then my mum (took / takes) an onion and (chops / chopped) it and put (into / from) a pan with hot oil. and when the onion was ready, she (poured / pours) it out into the pot with vegetables. at last she (put / puts / putting) some sour cream. and borsch (are / was) ready.

1. cooked 2. took 3. peeled 4. cut 5. put 6. boiled 7. took 8. chopped 9. into 10. poured 11. put 12. was

yesterday my mum cooked  borsch. she  took  two beets (буряки), seven potatoes, one carrot, some cabbage and two onions. she  peeled  beats, potatoes and a carrot. then she cut  them and the cabbage. after that she put  the vegetables into a pot and boiled  them. then my mum took  an onion and  chopped it and put into a pan with hot oil. and when the onion was ready, she poured  it out into the pot with vegetables. at last she  put  some sour cream. and borsch    was ready.

1his mobile rang when he was driving to the office. 2 everybody was preparing for the new year. 3  i was shopping in ikea. 4 children were watching 101 dalmatians on video. 5 was snowing heavily. 6 was celebrating my birthday. 7 sleaping. 8 sun was shining, a light wind was blowing, happy people were walking in the streets. 9 clock was ticking, the fire was burning, we were talking and having a tea. 10 they were resting in miami when a storm started. 11 when i entered the doctor was keying the name of the next patient into his computer. 12 at seven o`clock she was waiting for him where they usually met. 13 now she is looking forward to seeing sharon again. 14 i was reading a magazine while you were sleaping. 15 at the period of time he was working for a big international company. 16 flashing: denis. he was waiting for me at the club. 17 was shouting and no one listning.

mathematicians are stunned by the discovery that  prime numbers  are pickier than previously thought. the find suggests number theorists need to be a little more careful when exploring the vast infinity of primes.

primes, the numbers divisible only by themselves and 1, are the building blocks from which the rest of the number line is constructed, as all other numbers are created by multiplying primes together. that makes deciphering their mysteries key to understanding the fundamentals of arithmetic.

although whether a number is prime or not is pre-determined, mathematicians don’t have a way to predict which numbers are prime, and so tend to treat them as if they occur randomly. now  kannan soundararajan  and  robert lemke oliver  of stanford university in california have discovered that isn’t quite right.

“it was very weird,” says soundararajan. “it’s like some painting you are very familiar with, and then suddenly you realise there is a figure in the painting you’ve never seen before.” mathematicians shocked to find pattern in ‘random’ prime numbers