Some of them which remain in the air _____ the air pollution横线上填什么?cause?causes?还是causing

some of them与some of which的区别是什么 The medicine has many functions,__are unknown to us.a.some of which b.which of themc.that some ofd.of which some of them (2/3))are beyond our control.A.some of them B.some of which C.some of w I have many friends, -------are businessmen.A some of them B of who them C some of whom D some of which Some of them are The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them some of the ways in which people in Europe adapted to them.看不懂 从句中some/none of 后面什么时候用them?什么时候which、whom?要很具体的! I have many friends,( )some are businessmen.A.of them B.from which C.who of D.of whom some of them 为什么要用them? some of them are red.some of them are yellow. Here are some of them. some of they还是them? Some of them 如何读? some of them怎么读 I have a lot of good friends,are engineers.I have a lot of good friends,are engineers.a.some of them b.some of which c.some of whom d.some of that求正确答案及为什么 英语语法,定语从句This would save the life of many animals,some of which have almost die.为什么不能说成some of them?到底什么时候用some of them呢?请详细说明他们之间的用法差别, neither of which与neither of them