You can’t be ______ when you camp _____ a high altitude, ________ the air is thin. 
#19622
A
enough careful; at; which
B
too careful; at; where
C
careful enough; on;at which
D
too careful; on; that
推荐题目
_____should not be allowed to go out at night.
#34925
A
Twelve-year-old
B
Twelve-year-olds
C
Twelve year old
D
Twelve years old
 Jack is late again. It is ____ of him to keep others waiting.
#19504
A
aggressive
B
appropriate
C
desperate
D
typical