The Smiths ______ their breakfast when the doorbell rang.A．hadB．has been havingC
题型：不详难度：来源：
The Smiths ______ their breakfast when the doorbell rang.| A．had | B．has been having | C．are having | D．were having |
|
答案
| D |
解析
| 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。 |
举一反三
| The only means to achieve success ___ to appeal to arms. |
| Neither Tom nor his parents ______ at home. |
His family ____ a large one. The whole family ____ watching TV. | A．is…is | B．are…are | C．are…is | D．is…are |
|
Nothing but grass and trees ____ the hill. | A．covers | B．cover | C．covering | D．iscovering |
|
| Ten minutes ____ enough for me. |
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