Tom was badly injured in the accident last week. A new manager____ to take his place since then. 

—What’s the matter,Ann?You look sad.—Oh,nothing much.As a matter of fact,I　　 of my friend back home.

Rainforests _______ and burned at such a speed that they will disappear from the earth in the      near future.

By the time a child is five, he _______ hundreds of hours of television.

There was a knock at the door. It was the second time someone _______ me that evening.