Something must be done as soon as possible if the rare species____saved. A.be B.are to be C.can be
问题描述：
Something must be done as soon as possible if the rare species____saved. A.be B.are to be C.can be
Something must be done as soon as possible if the rare species____saved.
A.be B.are to be C.can beD.will be
答
B.are to be
be to do表将来时