当回答是A key and a notebook.时,该问What ’s in the bag?还是What are in the bag?Why?
问题描述：
当回答是A key and a notebook.时,该问What ’s in the bag?还是What are in the bag?Why?
答
What ’s in the bag?
答
是What are in the bag?
因为根据回答可知书包里不知一种东西在里面