The oil must be used up, the light went out.
The number of people invited ___fifty, but a number of them____ absent fordifferent reasons.
They were arguing _____each other _____ the cause of SARS.
-----Hello, come in.. -----Thank you.
A group of soldiers went into the woods _______ the missing pilot.
Was it on that morning ________ you left for Beijing ______ he discovered our secret?