问题
                    
Her daughter began to play _____piano when she was five. Now she’s very good at it.
                            A:an
B:a
C:the
D:/
                        
                        B:a
C:the
D:/
正确答案是:
                        
                        
                        
                    同类题型
                    How much did the company donate to build the school library?— About three ______ yuan.
We carefully compared the result of the first experiment with_______ of the second one.
You look so happy!— That’s because an old friend of is coming.
Peter and I ________ in the same class. ________ are good friends.
My friend Rose always hurtsplaying sports, so her mother worries aboutVery much.