ItsinceHehasbeeninth的精选

问题详情：86. 写出同义句(e.....)Hehasbeenintheclubfortwoyears.=Hejoinedtheclubtwoyearsago.87. 变为被动语态Peoplehaveacquiredknowledgethroughexploration.88. 我们保护自然的原因是我们能从中受益。（Thereas...