my sister told me who she was waiting
问题描述：
my sister told me who she was waiting
答
my sister told me who she was waiting for.
wait是不及物动词
my sister told me who she was awaiting?
await是及物动词，，指（某人）等候（某人某物）
答
不对.wait是作等待说时是不及物动词,后面必须加介词.
应该改为my sister told me who she was waiting for