问题
选择题
— Daniel, the speech competition will begin soon. Please ________ the microphone a bit to make everyone hear more clearly.
— No problem!
A．turn on
B．turn up
C．turn off
D．turn down
答案
答案：B
题目分析：turn on打开，发动；turn up发生，开大；turn off关掉，关闭；turn down减小，关低。句意：丹尼尔，演讲比赛就要开始了。请把麦克风调声音大一点，以便让每个人都能听得更清楚一些。结合语境可知选B。