Tom’s mother was ill hospital so he was hospital to look after her.A. in；inB. in the；onC.

问题补充：

Tom’s mother was ill hospital so he was hospital to look after her.

A. in；in

B. in the；on

C. in the；in

D. in；in the

答案：

A. in；in

B. in the；on

C. in the；in

(答案→)D. in；in the

解析：句意：汤姆的母亲生病住院了，因此他在医院照顾她。前文hospital表示抽象含义，住院，泛指，故不用冠词。下文特指他母亲住院的那所医院，故用定冠词，选D。