Passengers can ________ the amount of light they receive by using the black switch locared on their overhead panel.

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问题 Passengers can ________ the amount of light they receive by using the black switch locared on their overhead panel.

选项 A、supervise   
B、control
C、exchange
D、trade

答案B

解析 句子表示“使用开关调节光度”,因此动词B意为“调节,控制”为正确答案。
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