问题

You can’t be __ when you camp _ an high altitude, where the air is thin [ ]

A: enough careful; at
B: too careful; at
C: careful enough; on
D: too careful; on

正确答案是：

同类题型

I noticed my little son ____ the words ____ on his small blackboard. [ ]

Are there ___desks in the room–Yes, there are ______．

As I explained on the phone, your request that the plan at once will be considered at the next meeting.

More than one student, along with some parents, ____ quizzed for information on the reference book so far. [ ]

Our holiday cost a lot of money.— Did it? Well, that doesn’t matter _____ you enjoyed yourselves[ ]