单项选择题
A．The woman remains a total mystery to him. B．The woman is still trying to finish her work. C．He has devoted a whole month to his research. D．He didn’t expect to complete his work so soon.
A.assume B.confidential C.disagree D.formula E.forthcoming F.illustrating G.mysteriously H.observe I.optimistic J.package K.radically L.reality M.separately N.spoiling O.understimate