Электролиз в растворе с солью никеля продолжался в течение 30 мин. Какая масса никеля выделилась на катоде, если сила тока в течение процесса электролиза составляла 1,5 А?

Выберите правильный вариант.

1.    Where … your husband … five years ago?

a)    did… work   b) do … work   c) does … work

2. I have ... car.    ... car is white.  My ... friend has no ... car.

a) the, ---, the, ---   b) a, the, a, ---   c). a, the, ---,--- 

3. For breakfast she … a sandwich and a cup of tea.

a) to have   b) have   c) has 

4. I (to write) an English exercise now.

a) write   b) am writing   c) is writing

5. The park gates … at 6.30 p.m. every evening.

a) were locked   b) will be locked   c) are locked

6. …. is collecting stamps.

a) my friend’s hobby    b) my hobby’s friend    c) my friends’s hobby

7.    … you … me at the railway station next Sunday?

a)    Will … meet   b) Shall … meet   c) Do … meet

8. The weather (to change), and we can go for a walk.

a) changed   b) have changed   c) has changed

9. You … a good friend.

a)    is   b) are   c) am 

10. My ... parents are my grandparents.

a) sister's    b) mother's   c) friend's      

11. The letter … yesterday.

a)    received   b) was received   c) were receive

12. I usually go to …college by … bus.

a) the, a   b) ---, the   c) ---, ---       

13. Bread … every day.

a)    are eaten   b) is eaten   c) eat

14. I live in Moscow but … family lives in London.

a) his   b) their    c) my

15. You (to be) good friends.

a)   am   b) are   c) is

16.…you … home at six o'clock yesterday?

a)    Do …come   b) Did…come   c) Does… come

17. I (not to eat) ice cream tomorrow.

a)  not eat   b) don’t eat   c) won’t eat

18. Nick … to Moscow next week.

a)    is sent   b)  will be sent   c) was sent

19. Mary (to buy) a new hat.

a) bought   b) buys   c) has bought

20. His new book … next year.

a)    will be finished   b) was finished   c) will finish

21. My…sister’s children study in …USA.

a) the, the   b) ---, the   c) ---, ---

22. She … English well.

a)    speaks   b) to speak   c) speak

23. My friends (not to do) their homework at seven o’clock yesterday.

a) wasn’t doing   b) didn’t do   c) weren’t doing

24. She … English two years ago.

a)    studyed   b) studies   c) studied

25. My friends (not to do) their homework now.

a) isn’t doing   b)aren’t doing   c) don’t do

26. St. Petersburg … in 1703.

a)    founded   b) was founded   c) were founded

27. ….Tiraspol is situated on …left bank of …Dniester River.            

a) ---, a, ---   b) the, the, the    c) ---, the, the

28. We usually … four classes a day.

a)    has   b) to have   c) have

29. They … tea every day.

a)    drinks   b) drank   c) drink

30. I … to bed at ten o'clock yesterday

a)    go   b) goes   c) went

31. This text … at the last lesson.

a)    translated   b) will be translated   c) was translated

32. We … to a concert last Saturday.

a)    were invited   b) are invited   c) invited

33. I … to the cinema on Sunday.

a)  go   b) will go   c) goes

34. We have a big family. … family is friendly.

a) our   b) their   c) his

35..My dad asked me to buy ….

a) today’s newspaper   b) today newspaper   c) newspaper’s today

36. She was … first woman to swim across … English Channel.

a) a, the   b) ---, ---   c) the, the

37. When … they … home?

a) did   return   b) have returned   c) do returned

38. Helen  … this book 4 times.

a) read   b) have read   c) has read

39. When the phone rang, I… dinner.

a) cook   b) was cooking   c) cooked

40. Safari parks are … places of all to keep animals.

a) better   b) the best   c) more better