We should obey the rules round us.It very important.(两句合并为一句)给点提示:It's very important ______ us ______ obey the rules round us.

问题描述:

We should obey the rules round us.It very important.(两句合并为一句)
给点提示:It's very important ______ us ______ obey the rules round us.

to, to

for to

for to
It's very important for us to obey the rules round us.