He is only 10 years old, __________ he knows a lot about Chinese geography.
—Mum, can we go to the art museum tomorrow? —Sure. But first we should find out ________.
My grandparents like to live in a house _______ is not very big but bright and comfortable.
—What a big storm last night! —Yes. I was doing my homework. Suddenly, all the lights in my house _______.
Oxford University is ________ with tourists for its beautiful old buildings.
Trees ________ every year to make our city greener.