Our school prohibits ________ out of school without wearing the school brand, and we are allowed________school clothes every day.[ ]

All the building materials have been washed away.—So I have heard. But there was no sign ____ a heavy rain was on the way last night.

Look! A man is cutting a tree on the moon.—-It ______ be true. The teacher said there is no air on the moon.

________ difficult it might be, I will try mybest to work it out.

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