they to go to the park when they were children?A. Did, useB. Did, usedC. Do, usedD. Do,

发布时间：2020-08-22 16:34:34

     they      to go to the park when they were children?
A. Did, use
B. Did, used
C. Do, used
D. Do, use

网友回答

(答案→)A. Did, use
B. Did, used
C. Do, used
D. Do, use
解析：句意：当他们是孩子时，他们过去常常去公园吗？used to do sth过去常常做某事，也有时态变化。结合语境可知本句描述的是过去的动作，故助动词用过去时态，行为动词改为原形。选A。
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