Proteins are made up of folded irregularly chains, the links of which are amino acids.
A.made up of
B.folded irregularly
C.the links
D.which are

The astronomy is the oldest science, but it continues to be at the forefront of scientific thought.
A.The astronomy
B.science
C.continues to
D.at

Gold or silver bullion serve into commerce mediums of exchange all over the world.
A.silver
B.into
C.all
D.the world

The passage mainly discusses costumes in term of its__________
A.physical protection
B.religious significance
C.social function
D.beauty and attractiveness

What is the purpose of the paragraph 1?
A.To describe the uses of costume
B.To contrast costume with the clothing
C.To trade the origins of costume
D.To point out that clothing developed before costume

_________(37)
A.usage
B.advantage
C.use
D.utilization

_________(39)
A.to be
B.being
C.like
D.as

_________(41)
A.electric
B.electrical
C.electricity
D.electrician's

_________(42)
A.closeness
B.relation
C.relationship
D.kinship

_________(44)
A.matters
B.substances
C.materials
D.equations