To her joy, Della earned first the trust of her students and then ____ of her colleagues. 

 It's an either-or situation - we can Buy a new car this year or we can go on holiday But we can’t do     .

—Don't be angry with your kid when he makes a mistake again, will you?—No, I won 't.  I know  that     of us  are perfect after all.

 The biggest cities in Canada only have about six million people while _______ in China are much larger.  

-- Are you sure that he will come here in time?--- You may ______ he will come to help us though he is very busy.