问题
选择题
26. Don’t all speak at once! _______ please.
A．One by one time
B．One for each time
C．Each at one time
D．One at a time
答案
答案：D
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26. Don’t all speak at once! _______ please.
A．One by one time
B．One for each time
C．Each at one time
D．One at a time
答案：D