Recently a survey ____ prices of the same goods in two different supermarkets has caused a heated discussion among citizens.
In our class there are 46 students, _______ half wear glasses.
Mr. Thomas is ______ a teacher to us. We look on him as our friend.
---Whose case is it? --- I’m not quite sure. But maybe it _______ Mr. White.
In order to by the education circle, he woks very hard.
It took more than twenty years for the great artist _the painting was finished completely.