(在擦浴室）The children_ their mother____the housework last Sunday.

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(在擦浴室）Thechildren_______theirmother__________thehouseworklastSunday.(在擦浴室）Thechildren_______theirmot

(在擦浴室）The children_______ their mother__________the housework last Sunday.
(在擦浴室）The children_______ their mother__________the housework last Sunday.

(在擦浴室）The children_______ their mother__________the housework last Sunday.
helped,do

helped
doing