Choose the best answer.
Pollution is the most important problem that all environmentalists are concerned_____.
A.upon
B.off
C.about
D.on

People like to play .................on each other on April Fool's Day.
A.games
B.treats
C.tricks
D.cards

Choose the best answer.
He did not get any promotion in his study because of being absorbed ___ sport.
A.at
B.through
C.on
D.in

Choose the best answer.
We needn’t always complain ____ pollution but we have to find out proper solutions _____ the problem.
A.on/ from
B.about/ to
C.at/ over
D.of/ for

Choose the best answer.
The fall in demand forced us ____ production.
A.cut
B.to cut
C.cutting
D.for cutting

Choose the best answer.
She spends ____ money on CDs.
A.too many of
B.a few of
C.many of
D.a rather large amount of

Choose the best answer.
We need ____ for the party.
A.three boxes of chocolate
B.three box of chocolate
C.three boxes of chocolates
D.three box of chocolates

Task 1. Choose the best answer.
He kept quiet ___.
A.so that to avoid trouble
B.so as to avoiding trouble
C.in order he could avoid trouble
D.in order to avoid trouble

Task 1. Choose the best answer.
Leave the documents ____.
A.as they are
B.as though they are
C.as if they are
D.like they are

Task 1. Choose the best answer.
They talked ____ the book.
A.as they had read
B.if they had read
C.as if they had read
D.as if they are reading