问题补充：
The little girl kept the house, because she wanted to keep it .
A. cleaning; clean
B. cleaning; cleaning
C. clean; clean
D. clean; cleaning
答案：
(答案→)A. cleaning; clean
B. cleaning; cleaning
C. clean; clean
D. clean; cleaning
解析：句意：这个小女孩一直在打扫房子，因为她想让它保持干净。Keep doing sth一直做某事；keep sth ad让某物保持某种状态。故选A。j
