选 D 这边是现在进行时态 要用doing
see sb doing看到某人正在做某事不好意思应该选A 这边有个often 是表示经常性的动作，而不是指特定的一次看到正在进行see sb. doing sth 是指”看见某人正在做某事”，不是全过程，表正在进行 see sb. do sth 是指”看见某人做过某事”是看着事情的发生全过程， 是看见某人做某事
I often see him () home work while I am playing every evening.A.do B.to do C.did D.doing
I often see him () home work while I am playing every evening.A.do B.to do C.did D.doing
英语人气：238 ℃时间：2020-02-05 14:17:54
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