spent
                    - __________ these tips, and your time _______ doing research on the Internet _________ much worthwhile.
 - He spent at least as much time reading as you _______on line yesterday.
 - I spent the whole day repairing the car. The work was______ easy.
 - She spent as much time as she could _____ over her lessons.
 - Though we spent a lot, we think it _____ because we succeeded in the end.
 - My mother spent about 2,000 dollars ______ the piano.[ ]
 - He spent one day __ the work.[ ]
 - He spent one day _____ the work.[ ]
 - He spent a week ____ the novel. [ ]
 - His wife spent too much money _____ the villa.