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