单选题That evening he ____&nbsp

问题补充：

单选题Thateveninghe________whathehadthoughtabouttheresearch.A.set about ; set downB.set about; to set downC.set out ; setting downD.set out; to set down

答案：

D解析本题考查set短语辨析。句意：那天晚上他着手记下他想到的关于实验的东西。set about doing sth=set out to do sth着手做某事。