..It is difficult to_______a conversation with someone who only says "Yes" or "No".A. keep up B.hold up c.pick up D.make up
The problem of air pollution is becoming more serious ______ the increasing number of cars.
-- Tom, why didn’t you go to the flower show?--I think it’s something ______ pleasant.
Henry works as a teacher now, but he ______ on a farm for three years.
The bookstore has sold _______children’s books as they did last year.
_____it is to have an exciting football game in the afternoon after school!