单项选择题

Questions 29 to 31 are based on the passage you have just heard.

A. Two to four times.
B. Four to six times.
C. Four to eight times.
D. Six to ten times.
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单项选择题
A. A sales representative.B. A store manager.C. A committee chairperson.D. A class president.
A. A sales representative.
B. A store manager.
C. A committee chairperson.
D. A class president.
单项选择题
A. From three to five months. B. Three months. C. Five months. D. Four months.
A. From three to five months.
B. Three months.
C. Five months.
D. Four months.
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