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
Eggs, meat, vegetables and other foods can easily be poisoned by microorganisms such as ______.
#6245
A
phenomena
B
dilemma
C
diploma
D
bacteria
One hundred percent _______ to your studies, though it can be lonely and no fun at all, will leave precious marks on your youth.
#5191
A
commitment
B
attention
C
reference
D
reaction
You are really very kind. I’ll never forget the _________ you have done to me.
#7062
A
favour
B
deed
C
help
D
good
—I’ve got an “A” in the examination. —That’s a good ______. You will surely win a second.
#7235
A
result
B
news
C
start
D
idea
John says that his present job does not provide him with enough _____ for his organizing ability.
#7385
A
scope
B
space
C
capacity
D
range