填空题

Fred was playing the piano while Mary and I ( sing) （）

【参考答案】

were singing

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单项选择题

What can we learn from the conversation？（）

A．It’ s quiet in the restaurant.
B．The price is high in the restaurant.
C．The restaurant serves good food.
D．The restaurant is too far from their school.

填空题

They solved that problem ( intelligence) （）