The boy pretended ______ his homework, when his parents came back home.
Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
After a long vacation, Mike came back _________.
This sweater fits me, but I can’t afford to buy __________. I have to choose _________ which is cheap enough for me.
He suggested the problem worth paying attention ______ at the meeting.