问题
选择题
The roller coaster there moved _______ high speed.
A．in
B．on
C．with
D．at
答案
答案：D
at speed意思是以…的速度，固定短语。
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The roller coaster there moved _______ high speed.
A．in
B．on
C．with
D．at
答案：D
at speed意思是以…的速度，固定短语。