Only when it is hungry____attack a human being.
The young lady spoke so fast that I understood ____ of her speech.
It is thought that a new system _____ the place of the old one in that company. But things are getting worse and worse.
When the people all over the world are of one heart, ______ becomes easy.
China daily is popular with students of English because it helps to improve ___ English.
– Mary told me she would ______computer study.---Really? I’ll try my best to ask her to _____such foolish ideas.