We find ______ necessary to protect the earth.A.it B.this C.that D.what
问题描述：
We find ______ necessary to protect the earth.A.it B.this C.that D.what
请各位大侠说明原因,为什么?
答
A it作形式宾语,正的宾语是后面的部分.
还原成正常语序就是We find to protect the earth is necessary.