House prices keep rising these days. A flat in our city costs ____ now as in 1990.

Parents,of course,will do everything they could to ________ their children from harm.[ ]

对下列各项划线词语的解说，错误的是（ ）

.In the cave they found the very book, the cover of _______was torn

He often does everything ______. No one knows what he plans ______.