问题
选择题
I wonder how long it will be before he_________ at the meeting.
A．turns down
B．turns to
C．turns up
D．turns out
答案
答案：C
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I wonder how long it will be before he_________ at the meeting.
A．turns down
B．turns to
C．turns up
D．turns out
答案：C
），重力加速度为g。