We know _____America is great not because it is perfect but because it can always be made better and _____ the unfinished work of perfecting the union falls to each of its citizens

The order came that the medical supplies______to Beijing for the H1N1 flu soon. [ ]

It has been announced that all thecandidates______ remain in their seats until all the papers have beencollected

Look! My classmate Ben is _____. He often ______.

r busy he is, he will ____ some timefor exercise every day.