单项选择题

A．Rise.
B．Fall.
C．V-shape.
D．Zigzag.
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单项选择题
A．Find a hotel nearby again in a few days.B．Accommodate his parents in his dormitory.C．Ask his parents not come until he finds a proper hotel.D．Phone a hotel farther from the campus for a reservation.
A．Find a hotel nearby again in a few days.
B．Accommodate his parents in his dormitory.
C．Ask his parents not come until he finds a proper hotel.
D．Phone a hotel farther from the campus for a reservation.
填空题
Widely using PrEPs may cause potential problems like ethical issues and ________________.
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