Try to a few hours each week for exercise.
—Have you finished the work?—Not yet. I _______ to do it just a moment ago.
______ is known to everybody, the moon travels round the earth every month.
When you are driving on this road, you have to limit your speed _____ 60 miles per hour.
—What do you mean. There are only ten tickets?—There ______ be twelve.
Jane is said _______ an opera singer in her youth.