The two girls are so alike that strangers find __________ difficult to tell one from the other.
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.