Don’t all speak at once!_________,please .A.Each at one time B.One by one time C.One for each

题目

Don’t all speak at once!_________,please .A.Each at one time B.One by one time C.One for each
b的one by one是一个一个的 为什么不对
D.One at a time

答案

D one at a time 一次一个人
B One by one time 有点像中式英语,在英语短语中没有这个短语,如果去掉time就是一个接一个的意思,符合上下句意.