填空题

It is important that he (be)（）called back immediately.

【参考答案】

(should) be
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Fred was playing the piano while Mary and I (sing)（）
单项选择题
What does the woman want to know（）

A. What the flight number is.
B. Where to find a telephone.
C. What time the flight departs.
D. Where to board the plane.
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