单项选择题

His health ______, my uncle had to leave the air force in 1948.

A．failed
B．was failed
C．fairing
D．had failed
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单项选择题
Department stores play slower music during the five weekdays to encourage shopping.
A．百货商店在五天工作日播放慢节奏的音乐来鼓励消费。
B．百货商店在五天工作日玩慢节奏的音乐来鼓励消费。
C．百货商店在五天工作日没有播放慢节奏的音乐却能控制消费。
D．百货商店在五天工作日播放音乐来消费。
单项选择题
The old professor had such a bad memory that he looked for the watch while he is ______ .
A．having it on
B．having on it
C．wearing it
D．putting it on
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