He had to pause from time to time to wipe the sweat from his forehead, because the air—conditioning system ______________.
The last time I _________ her,she _________at a medical college.
—My watch is out of order.—Then why don’t you have _________?
I bought the telephone here yesterday but it _________ work.
Father made a promise_________ I passed the examination he would buy me a bicycle.
It is said that _________ mobile telephone was invented not very long ago.