The scientists were trying to look for all possible _______ as to where this species came from.
#5295
A
signals
B
marks
C
clues
D
spots
推荐题目
Giving up smoking is a slow and painful _______ for him.
#5096
A
pressure
B
process
C
motivation
D
profession
She’s such a smart ___ that she can type 150 words in one minute.
#6617
A
typewriter
B
typist
C
surgeon
D
pilot
He received ten days’ __________ to leave the office because he was often late for work.
#6988
A
notice
B
attention
C
information
D
service
It is obvious that this anti-smoking ____ is mainly aimed at young teenagers．
#6531
A
campaign
B
war
C
battle
D
fighting