I helped...句型 — 英语选择题

周末，Sam帮家人做了三件事：帮妈妈洗衣服（wash clothes）、帮爸爸做饭（cook dinner）、帮奶奶扫地（clean the room）。要表达他过去做的这些事，下面哪句话完全正确？A. I helped Mum washed clothes. B. I helped Dad cooked dinner. C. I helped Mum and I helped Grandma cleaned the room. D. I helped Dad cook dinner and I helped Grandma clean the room.