Go and wash your hands ____ once.He made a cake _____ himself.用适当的介词填空
问题描述：
Go and wash your hands ____ once.He made a cake _____ himself.用适当的介词填空
答
at once， by himself
答
at by
答
Go and wash your hands __at__ once. 马上去洗手，其中，at once是立刻、马上的意思；
He made a cake ___by_ himself.他自己做了个蛋糕。
答
at once立刻，do sth for someone理解成为某人做某事，当然此处大意是为他自己做蛋糕
答
Go and wash your hands at once. He made a cake for himself.