I in the hospital yesterday. I had to look after my sick mother.A. amB. wasC. areD. were

问题补充：

I in the hospital yesterday. I had to look after my sick mother.

A. am

B. was

C. are

D. were

答案：

A. am

(答案→)B. was

C. are

D. were

解析：句意：我昨天在医院里。我不得不照顾我生病的妈妈。句中yesterday表示过去的时间，故用was。