单项选择题

Questions 22～25 are based on the following dialogue. How many times has Christina tried to give up smoking

A．Thirty times.
B．Five times.
C．Lots of times.
D．Twice.
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单项选择题
What is Jack doing at the beginning of the dialogue
A．Planning a sightseeing tour.
B．Writing to his uncle.
C．Arranging his class schedule.
D．Reading a language textbook.
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