The bones of mammals, not alike those of other vertebrates, show a high degree of differentiation.
A.not alike
B.differentiation
C.those
D.other

Desert plants require less care and are more attractive than house plants.
A.non-interference
B.misapprehension
C.disqualification
D.inattention

A.cleans out
B.picks up
C.carries out
D.holds up

A.borders
B.topside
C.backside
D.hillsides

A.large
B.little
C.few
D.much

She was unhappy that she lost contact with a lot of her old friends when she went
abroad to study.
A.put in charge of
B.made room for
C.got in touch with
D.lost control of

A.takes
B.decides
C.completes
D.talks

A.result
B.lunch
C.subject
D.student

_______(46)
A.also
B.already
C.although
D.always

_______(47)
A.wonderful
B.terrific
C.good
D.excellent