Помогите.... ученик получил оценки 2,2,3,4. Сколько нужно получить 5 чтобы окончательная оценка была 4.  Логически понимаем,на письме ни как

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В реакцию с бертолетовой солью вступил фосфор массой 27,9 г : 6 Р + КСlО3 = 3 Р2О5 + 5КСl. Рассчитайте массы продуктов этой реакции.

VIII. Choose the right answers:

1 .I usually   ________________ my Granny on Saturday.

a) visits

b) visited

c) visit

d) will visit

2. There   ________________ 30 pupils in our class last year.

a) were

b) was

c) are

d) is

3. I can _________   English   very well.

a) spoke

b) speaks

c) speak

d) will speak

4._____________   they go to the Zoo with us next week?

a) does

b) will

c) do

d) did

5.  I ___________ to my friend’s place   yesterday.

a) goed

b) went

c) goes

d) will go

6. He won’t   _______________ his holidays in America.

a) spent

b) spended

c) spends

d) spend

7. My pencil   _________ on the table yesterday. My mother ___________ it in the box.

a) was not, put

b) are not, put

c) were not, put

d) was not, puts

8. Do you like   ____________ to school? Yes, I ______________.

a) to go, did.

b) go, do.

c) to go, do.

d) to go, don’t.

9. We learn how to   use computers at ______________ lessons.

a) I. T.

b) Literature

c) Drama

d) Maths

10. My father often   ____________ food in this supermarket.

a) buys

b) will buy

c) bought

d) buy