Be careful, _______ you'll fall down.
A、onthecontraryC
暫無解析
It________asashocktorealizethatIwasnotaloneintheroom.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
She________hernervousnesstotheimportanceoftheinterview.
Whenworkersareorganizedintradeunions,employersfindithardtolaythem________.
Theenginehasbrokenandtheboatis______onthewater.
