单项选择题

A．Because he has no experience.
B．Because he has the experience to do it.
C．Because he will do it better if he has experience.
D．Because his experiment is not very difficult.
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单项选择题
A．In a hospital.B．In a library.C．In a travel agency.D．In a restaurant.
A．In a hospital.
B．In a library.
C．In a travel agency.
D．In a restaurant.
单项选择题
Every camera we sell comes with a two-year______ , so you can buy any one you like at ease.
A．guarantee
B．sincerity
C．confirmation
D．assessment
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