Tom, you _____ leave all you clothes on the floor like this !
Itis ______ to have achieved so much in such a short time.
In fact, the renovation is just one move in a huge project to improve Chinese teachers’ housing ______ in recent years.
A curve is a line ______ no part is straight and which has no angle.
Research shows that humans ______ from selfish to unselfish behavior when they are watched.
______ 6 world powers have accepted ______ Iranian offer for talks on its disputed nuclear program.