标题: PP 语法请教 [打印本页] 作者: dapangqiu 时间: 2003-11-11 05:52 标题: PP 语法请教 Of 120( minerals known )to have been used( as gemstones), only about 25 are in (common use) in (today jewelry.)
我选in common use
(Prehistoric) villagers (tended to )work harder, suffer (form )more diseases, and eat( the) poorer diet than nomadic hunters did.