Effective measures should be taken to ______ the rare species _______ being over-killed by human beings.
A.keep; against | B.prevent; from |
C.stop; against | D.protect; from |
相关知识点
推荐套卷
Effective measures should be taken to ______ the rare species _______ being over-killed by human beings.
A.keep; against | B.prevent; from |
C.stop; against | D.protect; from |