I’m going to buy a car. Any advice, Charlie?—Well, it depends on(根据) ________. If money isn’t a problem, you can buy a BMW.

He would rather ______ his mother the truth.

Her math book is _____ the sofa.

What color is our national（国家的）flag(旗帜)? It’s ________.

There is ____ elephant in the zoo._____elephant likes bananas.