The Kings _______(do ) some cleaning in the garden when the doorbell rang.
问题描述：
The Kings _______(do ) some cleaning in the garden when the doorbell rang.
答
was doingThe Kings是什么意思？在这里指单数还是复数？什么时候指单数，什么时候指复数？不好意思 填were doing the kings "King一家人" 只能用复数