pp-1-15

guandream

15 Because of ---diversity, seven separate groupings or divisions of algue have been established by botanists.

A them, B so that, C those, D their.

I am confused between C and D. can somebody explain to me? thanks.

zhoushao

those是限定词，其实是that的复数形式，只是说＂那些＂，一般前文有所提才能用，而their表示＂他们的＂，是物主代词，选Ｄ

guandream

thanks,

zhoushao mm

iamhlw

I think "those" need connect with 複數, but "their" don't need.   EX: Marry and Tom have a dog and their dog is cute~~~~