英语 This is my mum.（改为否定句） This______ ______my mum.
How are you?（回答问题） _____ _____,thank you.
Hi!____to Beijing.It is the capital(首都)of _____.It is a _____city（城市）.You can___many foreigners_____.The foreigners often say"______do you____?","_____to_____you!"______"thank you."