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 young woman rushed to the hospital ________ she heard the terrible news.
#5796
A
in a moment
B
at the moment
C
the moment
D
for a moment
.Symphony means a long piece of music that has three or four parts or ＿＿.
#6593
A
move
B
movement
C
moving
D
movements
Personally I think the ______ Andrew drew from his simple experiment is not scientific.
#5488
A
conclusion
B
decision
C
information
D
invention
Think twice before you make a decision on this matter. It will make ______ to your life.
#7246
A
no difference
B
a difference
C
little difference
D
difference
The teacher has a(an) ___________ to get off topic; sometimes it is difficult for students to make out what he is saying.
#6189
A
concern
B
determination
C
intention
D
tendency