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After years of research, he found the key ____ differences between species.
#5237
A
to explain
B
to explaining
C
of explaining
D
explaining
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There is nearly five thousand dollars         of goods in the shop.
#5897
A
worth
B
price
C
value
D
prize
—What’s your ________?           —I like collecting stamps.  
#5595
A
name
B
job
C
address
D
hobby
Someone says that love is a rose with thorns（刺）. It is attractive from a ______, but as soon as you touch it, you might get hurt.
#6205
A
length
B
way
C
distance
D
space
I’m really a bit worried because I have no idea what my parents’ _________ will be to my poor examination result．
#5746
A
expression
B
reaction
C
appearance
D
expectation
Many families were broken up and their members were killed in the _______ caused by the earthquake inYaan.
#5394
A
chaos
B
chains
C
plains
D
masses