---What did our teacher do?---He raised his arm as a(n)        for us to stop.
#5045
A
signal
B
advice
C
evidence
D
design
推荐题目
Life is full of _______.School is thought as the most ­­­_______ obstacle(障碍) in the lives of youth today.
#5478
A
challenge; challenging
B
challenges; challenged
C
challenges; challenging
D
challenging; challenges
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