题型:选择题 —Is Bob still performing?—Im afraid not.He is said _______ the stage already as he has become an official.A.to have leftB.to leaveC.to have been leftD.to be left 查看答案
题型:选择题 地理环境中各事象之间是相互联系的,若某事象发生变化就会给其他事象带来影响,甚至发生一系列的变化。读图,回答问题。图中所示的中心事象“甲”可能是( )A.人口数量增多B.气候变化C.森林破坏D.围湖造田 查看答案