单项选择题

A．He was trained as an electronics engineer.
B．He was trained as a mechanical engineer.
C．He was trained as a communication engineer.
D．He was trained as a nuclear engineer.
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单项选择题
A．Because nine is an odd number.B．Because the elevator got stuck.C．Because the elevator is too old.D．Because there arc too many people in the elevator.
A．Because nine is an odd number.
B．Because the elevator got stuck.
C．Because the elevator is too old.
D．Because there arc too many people in the elevator.
单项选择题
A．Studying.B．Preparing snacks.C．Playing cards.D．Learning how to play bridge.
A．Studying.
B．Preparing snacks.
C．Playing cards.
D．Learning how to play bridge.
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