题目内容：
请根据短文内容，回答题。Even a child knows that nodding head means "Yes". But some people would probably ____51____ when they first came to India. When they talked to an Indian, he would often shake his head. They might think that the India did not like ____52____ they said, but on the contrary, he was expressing ____53.____
The Indians have a habit of shaking their heads slightly when they talk to ____54____ . It doesn't mean "No", but "Yes". If a person doesn't ____55____ , it might cause misunderstandings.
At one time, a foreign diplomat (外交官) to India told his driver who was an Indian to send him to his office. The driver ____56____ his head. The young diplomat repeated his ____57____ and the driver shook his head again. At last, the ____58____ shouted angrily, "Drive me to my office at once!" The driver also in a quite loud ____59 ____, "Yes, sir. "smiling and ____60____ his head at the same time.
________ A．puzzled
B．be puzzled
C．puzzle
D．be puzzling
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