—Can I pay the bill by check?

—Sorry, sir．But it is the management rules of our hotel that payment ____ be made in cash．

—Mr．Anderson is popular with his students, for he is kind, strict and knowledgeable．

—No wonder he has such a good ___  ．

----- You should have finished your homework, I gave your much time.

----- Sorry, but I_____ it.

Though ______ of danger, sightseers have been flocking to the site where the world’s biggest terrorist Bin Laden lived.

With all his attention ____ on the computer game, the boy even didn't notice his mother came in.

Children’s brains can’t develop properly_______ they lack protein(蛋白质).

_______that they lost the game, tears came down Kate’s face.

--Why does the river smell terrible?

--Because large quantities of water__________.

He is ____our teacher; he is also our best friend.

--- We expected you yesterday．

--- I'm sorry, I       you to say that I couldn't be here until today．