To be good for agricultural perpose,soil must have in it the minerals plants______.
A.to require B.require C.required D.requiring
理由
To be good for agricultural perpose,soil must have in it the minerals plants______.
A.to require B.require C.required D.requiring
理由
B reqire
soil must have in it the minerals (that) plants require
that 从句里 plants 主语 require 是动词