It is useful to science _______ the earth as an object in space.

_______themovieIwouldhavefinishedmypaperlastSunday.

Senior members of the staff competed eagerly ________ the position of sales manager in the company.

The address book ________ the email addresses of your friends or groups of colleagues.

Insomeschoolschildrenwhoprefertoreadbooksratherthan________footballbecomesocialoutcasts(被抛弃者).