Question

31. I congratulate you ... the event.
a) on

b) with

c) for



32. The conference began ... October 18.

a) at

b) in

c) on



33. You will find the news ... the bottom of the newspaper.

a) at

b) in

c) on



34. The most important thing ... the present time is to get rid of the prejudice that only special officials can carry on the administration of the State.

a) in

b) for

c) at



35. A glass vase is made ... glass.

a) from

b) out of

c) with



36. Paper is made ... wood-pulp.

a) from

b) with

c) out of

Answer 1

31. - a) 
32. -  b)
33. - a)
34. - b)
35. - a)
36. - c)

Answer 2

I congratulate you on the event.
The conference began on october 18.
You will find the news in the bottom of the newspaper.
The most important thing at the present time is to get rid of the prejudice that only special officials can carry on the administration of the State.
A glass vase is made from glass (я бы поставила of)
Paper is made from wood -pulp.