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单项选择题

What is the main concern of talk

A．How the tone of a piano is affected by its shape.
B．How to measure a piano’s resonance.
C．How to improve your performance by choosing the right piano.
D．How size makes a piano more expensive.
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热门试题

单项选择题What was the topic of their conversation last time

A．The US school system.
B．The Continental school system.
C．The Japanese school system.
D．The Indian school system.

单项选择题What is the relationship between the man and woman

A．Husband and wife.
B．Brother and sister.
C．Good friends.
D．Colleagues.