Your desk is covered with too many unnecessary things, including used papers and books. You’d better ________ some of them.
You can’t be too careful; this kind of cloth_____.
I remember quite well that it ______Sue and John who helped me that morning
—We were not sure which way to go. In the end we chose to turn right. —You _______ the wrong way. You _______ left.
—Does Mr. Smith live next door to you? —No, but he _______.
______ for a long time, but he managed to catch up with his classmates at last.