单项选择题

Jack called the airline to ______ his flight to Beijing this morning.

A. improve
B. believe
C. confirm
D. insure
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单项选择题
A. 11:00. B. 11:50. C. 12:00. D. 12:10.
A. 11:00. B. 11:50.
C. 12:00. D. 12:10.
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