He started to work dilligently _____ he came up with the idea of hybrid rice for

题干

He started to work dilligently _____ he came up with the idea of hybrid rice for the first time in the 1960’s.

A．at once

B．the moment

C．for the moment

D．in no time

上一题下一题 0.64难度单项选择更新时间:2011-05-03 02:13:08

小学学科试题库

初中学科试题库

高中学科试题库