已知万有引力恒量G,要计算地球的质量还必须已知某些数据,现给出以下各组数据。可以计算出地球质量的有
( ) It’s time ________.
( ) Who’s the ________, Jean, Joan or Jennet?
( ) A cow is ________ bigger than a mouse.
() The bed ________ the right is yours
( ) —_________are his football clothes? — Under the bed.