单选题Parents often have their&

问题补充：

单选题Parentsoftenhavetheirchildren_____littlehouseworksothattheycanhavemoretime______.A.doing; studyingB.done; studiedC.to do; to studyD.do; to study

答案：

D解析考查固定结构。第一空 Have sb do sth.使/让某人做某事；第二空考查have time to do sth 有时间做某事。所以选 D。