We were delayed at the airport. _________ we would have been here by lunch time.

How many birds can you see in the trees—I can see _________ birds in them.

Where he go on vacation — He went to the mountains.

_________ is known to all is that the earth is smaller than the sun.

1Smoking is not allowed inpublic places since May 1st. It may be a good chance for some people to ______smoking.