After years of research, he found the key ____ differences between species.
#5237
A
to explain
B
to explaining
C
of explaining
D
explaining
推荐题目
The police are trying to find out the ________ of the man killed in the traffic accident.
#5833
A
identity
B
appearance
C
lifestyle
D
character
One is not born a ____; one becomes a _____.
#6644
A
genius; talent
B
talent; genius
C
genius; genius
D
gift; talent
Peter, a superstar in environment protection, reduces plastic and other _______ through DIY.
#6093
A
goods
B
ruins
C
wastes
D
objects
.Last summer I had ______ in the south of France .
#6668
A
amusing experience
B
a amusing experience
C
an amused experience
D
an amusing experience
Much to his _____, his father was not angry at the result of the examination.
#6532
A
surprised
B
exciting
C
surprise
D
excited