问题标题：
Hekepton_______themountainsallby_______forthreedays．（）A.toclimb；myselfB.toclimb；himselfC.climbing；myselfD.climbing；himself
问题描述：
He kept on _______ the mountains all by _______ for three days．（）
A.to climb； myself
B.to climb； himself
C.climbing； myself
D.climbing； himself
刘建昌回答：
答案：D．
keep on doing sth是固定搭配，表示坚持（一直）做某事，by oneself表示"独自…"．这里主语是he，所以反身代词用himself，故选D．
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