There are unhappy smiles , such as when someone “loses ________face ” and smiles to hide it

Are all the students from in your class—No, there are only three in our class. The others are from other countries.

Miss Jones ________ music at Bardon School for five years when she was abroad and now she is an actress

The question that puzzled them is ____ they can get rid of the air pollution in the area.

Which of the two T-shirts would you like– ________. I don’t like their styles.