一道英文改句,many countries have made new laws.they went to fight pollution.many countries have made new laws so fight pollution.问号为两个填空
问题描述：
一道英文改句,
many countries have made new laws.they went to fight pollution.
many countries have made new laws so fight pollution.
问号为两个填空
答
as to
答
they can
答
as to (so as to为了,目的是).