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 |
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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 |