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【单选题】

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
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参考解析:
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举一反三

【单选题】The students found that all their homework was _____than they _____ before. [ ]

A.
1ess heavier; used to get
B.
1ess heavier; were used to getting
C.
1ess heavy; used to get
D.
1ess heavy; were used to getting