单项选择题
Through the open window we saw on the floor the happy father lying （） his stomach, his daughter riding excitedly on his back.
A.on B.with C.above D.from
单项选择题 Usually the teachers will be busy （） the test papers after an examination.
单项选择题 The problem, according to the experts, is （） we should do with the salty land.
单项选择题 As we all know, the government is now making every （） to set up a harmonious society.
