The Great Wall was built to keep ______  the invaders. 
#81866
A
in
B
out
C
up
D
off
推荐题目
Life is___,but there is no limit_____.
#66074
A
limited,to learn
B
limit,to learn
C
limited, to learning
D
limited,of learning
Dress warmly, _____ you'll catch cold. 
#83714
A
on the contrary
B
or rather
C
or else
D
in no way