the doctor and writer ____ in beijing last month A.is B.are C.was D.were

问题描述:

the doctor and writer ____ in beijing last month A.is B.are C.was D.were

答案:C
last month 上个月,用一般过去时,所以在 C,D 中选
而 the doctor and writer 指的是一个人"那位医生兼作家”,所以是单数概念用was
不明白的再问,多谢!