4.Politeness is a(n) ____ phenomenon among all the social groups, but it is marked by different cultures.
By making friends with the native speakers, one can ________ a lot of their language.
He has made up his mind to devote his life _________ pollution _________ happily.
—____________ difficulty you meet, remember that it might just be a touchstone. —You are right. __________ difficult it is, we will never give in.
We haven’t seen ________ of her films, but ________ from the one I have seen recently, I think she is a promising actress.
He fell in love with the beautiful scenery at the first sight, and _________ it ever since.