问题
选择题
The Smiths ______ their breakfast when the doorbell rang.
A．had
B．has been having
C．are having
D．were having
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。
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The Smiths ______ their breakfast when the doorbell rang.
A．had
B．has been having
C．are having
D．were having
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。