Do you buy these sweaters______Shanghai?—Yes. I sell them ______the people in Suzhou. [ ]

Can you work out the maths problem? —Sorry, I can ______ understand its meaning.

Who do you think is the man __________ first flew into space in China? — Yang Liwei is.

Mr Green wasn’t home yesterday evening. He was work.

Oh, this cartoon book is very interesting. Where did you buy ____? I want to buy _____, too.— In the bookshop near my home.