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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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 |