Marianne, a schoolgirl, was learning to play the piano, and day after day her father stood behind as she played. How patient and loving her father was, and how cleverly he   1__  Marianne how to play the difficult piece! And there, almost lost in the big chair, sat Wolfgang. Nobody told him to   2  when Marianne was playing.

One evening the father said to Marianne that she had done very well. At the moment Wolfgang climbed onto his father’s leg and said to his father that he wanted to   3  the wonderful piece.

What a joke that was! He picked up his baby son, laughed, and said, “Look at your   4          hands. Why, you cannot span (横跨) the keys yet, you must wait, little man. You must wait!”

There was no end of fun during tea, and Marianne told her mother about Wolfgang   5  to play one of the pieces.   6  a while, the father stood up. “Listen!” said he. “Listen! Marianne is playing that piece   7  than ever!" But Marianne was washing plates in the kitchen.

His wife following, he moved upstairs quietly, pushed the door, and saw little Wolfgang __8__  in the darkness (黑暗). “I love it   9 !” said the child. It was the   10  of Mozart’s life of music.

They learned it all by themselves. That is to say nobody told them ________ .

A. what to do it     B. how to do it     C. where to do     D. when to do

They learned it all by themselves. That is to say nobody told them ________ .

Nobody told us _____