单项选择题

A．By asking some students to explain the reason.
B．By giving them a test on the speed of sound.
C．By using a vivid question to check them.
D．By asking the students to restate his words.
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单项选择题
A．She was sick.B．She lost her job.C．She said goodbye to her boyfriend.D．She failed in the interview.
A．She was sick.
B．She lost her job.
C．She said goodbye to her boyfriend.
D．She failed in the interview.
单项选择题
A．He is a manager assistant in a store.B．He is a common labor worker in a supermarket.C．He works as a vice manager in a supermarket.D．He doesn’t have a job.
A．He is a manager assistant in a store.
B．He is a common labor worker in a supermarket.
C．He works as a vice manager in a supermarket.
D．He doesn’t have a job.
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