Tom has formed the habit of jogging_________ the tree-lined avenue for two hours every day.
My friend hasn’t _____ till now——I hope she isn’t ill.
We all believe that ______2010 Shanghai World Expo must be ___success.
Jane is a nurse in the hospital, ________ she learned in a local medical school.
He had led everyone to ______ that his family was very rich.
—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.