-- _____is that used for?---_____ the floor.
In New England, I made lots of friends ______ a very practical knowledge of the English language.
______ top students who were excellent at every subject all went either to Bashu or the No. 3 Middle School of Chongqing.
He is ______ as a leader but he hasn't ______ in teaching.
______ of a new car factory is good news for all the villagers.
In my opinion, ______.