You can't be _____ when you camp _____ at high altitude,when the _英语解答

You can't be _____ when you camp _____ at high altitude,when the air is thin.
A.enough careful,at
B.too careful,at
C.careful enough,on
D.too careful,on

人气：218 ℃　时间：2020-06-03 14:22:02

解答

B.too careful,at
（因为）高海拔地区的空气非常稀薄,露营时再小心也不为过.