–Where is Mr.Smith?--He isn’t here. He ______ to England.
I don’t know _______ .
----I feel tired and sleepy. -----Why not stop _______ ?
If there are ______ trees, the air in our city will be _______ cleaner.
There____ a football game on TV this afternoon .
I can______ you my dictionary,but you can______ it for only a week.