---I called you yesterday evening, but there was no answer.---Oh, I am sorry I _____dinner at my friend’s house.
What will you do if it _____ tomorrow?
----Could you tell me ________? ----It’s next to the post office.
This is the book ______we are looking for.
There ______ a knife and two forks on the table.
At last, the little boy was made _______ and began to laugh.