The experiment done with Sarah is an example of ____________________.
A.animals with natural system of communication
B.animals able to communicate with humans
C.animals possible to use language as humans
D.animals with a system of communication worked out by humans

The phrase “concerned with” is closest in meaning to ________________.

A.interested in
B.responsible for
C.related to
D.joined to

He drives me to the edge because he never stops talking.
A.irritates me
B.steers me
C.frightens me
D.moves me

Ours is among the few schools in the country which has been awarded the status as a standard school.
A.Ours
B.few schools
C.has been awarded
D.status as

Having punished twice this week, Kate feels ashamed of her bad behavior.
A.Having punished
B.this
C.ashamed
D.behavior

Fertilizers are used primarily to enrich the soil and increasing yield of crops
A.are
B.primarily
C.the soil
D.increasing

______(46)
A.knowing
B.knew
C.is known
D.known

_______(48)
A.thanks for
B.thanks to
C.in spite of
D.instead of

_______(49)
A.in
B.throughout
C.over
D.of

Can I help you? -No, thank you. I _____________.

A.served
B.am serving
C.was serving
D.am being served