请教2004-10-28/37/39/40，谢谢乐！！！

nickt

28-B concerning

37-B those

39-D And

40-A move"With"

nickt

28:U R right if in this way: Paleoanthropologists examine...,while physical anthropologists concerning ... study...

37:Among开头是倒装.Which指代Silicon Dioxide.

39:我是从理解上做的.

建议你下个T大全语法笔记 看看