i was really too busy with my homework and i couldn't help__housework.a.doing b.do c.did d.done为什么选B不选A

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iwasreallytoobusywithmyhomeworkandicouldn''thelp__housework.a.doingb.doc.didd.done为什么选B不选Aiwasreallyt

i was really too busy with my homework and i couldn't help__housework.a.doing b.do c.did d.done为什么选B不选A
i was really too busy with my homework and i couldn't help__housework.
a.doing b.do c.did d.done
为什么选B不选A

i was really too busy with my homework and i couldn't help__housework.a.doing b.do c.did d.done为什么选B不选A
can't help doing sth.的意思是情不自禁做某事
这里其实并没有用到这个固定词组
这里用到的结构是help do sth.帮着做某事
只不过这里不是能帮着做家务
是不能帮着做家务
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can't help doing sth. = 忍不住做某事, 例子:I can't help laughing. (我忍不住笑了)
help do sth. = 帮助做某事,在这里合适,所以选B。