It’s generous _______ them to donate money to UNICEF. They think it important _______ them to help poor children go to school.
--- Can I use the bike_______ you bought yesterday? --- Certainly. A. what B. which C. who
According to the new family planning policy in China, a couple can have a_______child if one of them is an only child. A. two B. second C. twice
Look at the sign _______! We shouldn't park our car here.
The telephone rang_______ Jenny was practicing the violin. A. until B. before C. while
--- Hi, David. _______do you go to see your grandparents? ---About three times a month. A. How long B. How often C. How soon