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
.He is a selfish and dishonest man, and is ___ by others.
#6503
A
thought badly of
B
ill thought of
C
highly thought
D
bad thought of
A bonus of five points can be added to a student's exam score as a_______ for good handwriting.
#5468
A
award
B
reward
C
courage
D
certificate
— What should I do before operating the new machine?— You’d better read its ______ first carefully.
#6819
A
explanations
B
instructions
C
descriptions
D
introductions
Fortunately, rescuers were able to gain to the disaster-hit area soon enough.
#6129
A
access
B
track
C
means
D
passage
I don’t think I am ____ ; it is said that _______- is the mother of success.
#6664
A
a failure; failure
B
failure; a failure
C
a failure; a failure
D
failure; failure