Question

The Smiths ______ their breakfast when the doorbell rang.

A. had
B. has been having
C. are having
D. were having

Answer 1

答案D
句意“史密斯一家正在吃早餐，就在这时门铃响了”。主语The Smiths为复数，主谓要一致，谓语也要用复数形式。