----I’ve finished cleaning all the furniture in the room.--I don’t think so. What about

问题补充：

----I’ve finished cleaning all the furniture in the room.

----I don’t think so. What about on the balcony?

A. the one

B. it

C. that

D. those

答案：

A. the one

B. it

(答案→)C. that

D. those

解析：考察代词。The one特指上文提及的可数名词单数；it指代上文出现的同一事物；that指代上文出现的可数名词单数或者不可数名词，后面一定要有定语修饰；those是that的复数形式。本题的that指代不可数名词furniture，后面有on the balcony修饰。