---Who is the boy over there? Is it John?--- No, it ______ be him. John is much taller.
Yunnan is colorfulmillions of people come to enjoy themselves every year.
I think Hangzhou is one of ________ in China
--Can I use your mobile phone? --Of course..
—______ does your school have sports meeting? —Twice a year.
Lucy is shy, so she is to speak in public.