Nowadays people are convinced ___ the negative effect of second-hand smoking ___ people around.

Which of these two English books will youborrow—I’ll borrow ____________ of them becausethey are very interesting.

Eric will never win a gold in the swimming race ______ he works hard.

Will you come to my office when youyour work? ——Sure

Li Ming always gets up early and he is ______ late for school.