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

________ with the size of the whole earth, the highest mountains do not seem high at all.

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

In the future, more ______ should be placed on the education of the young.

________somanypeopleintheUnitedStatesbeenoutofworkastoday.