The doctor thoughtwould be good for the patient to drink more water.A. thisB. thatC. oneD.

问题补充：

The doctor thoughtwould be good for the patient to drink more water.

A. this

B. that

C. one

D. it

答案：

A. this

B. that

C. one

(答案→)D. it

解析：本题考查代词 it 作形式主语。句意为:医生认为多喝水对这位病人有好处。根据句意不定式短语to drink more water在宾语从句中作真正的主语，只有it 可作形式主语，故选D项。