The quality of the things sold in this shop is better than ________ of ________ in that one．

 The quality of the things sold in this shop is better than ________ of ________ in that one． 

A.that; the one
B.those; what
C.that; those
D.which; the ones

解析：在比较级中，代替前面提到的不可数名词，通常用that；代替复数名词，通常用those．本句第一空用that代替quality；第二空用those代替things．

本题选C。