the sea,___their economies have always been based on ,is sud
the sea,___their economies have always been based on ,is suddenly threatening their existence. A.on which B .where (CD选项不写了) 我选的是B,还有,难道不是on which =where 这到底是为什么T 求拯救! 打错了!base 后面没有on...
1.既然你原句没有介词, 那就要找回介词,怎么找呢?是有根据的,就是be based on, 因此你选有on的那个. 2.their economies 是主语 have always been based (on可提到引导词前)是谓语,缺少宾语,where不能做宾语,只做状语,which能做宾语,因此选A。 3.至于你说的情况,where=介词+which是指作状语时通用,我举个...