单项选择题
A.improve B.increase C.progress D.occur
Through the open window we saw on the floor the happy f...
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
Usually the teachers will be busy （） the test papers af...
单项选择题Usually the teachers will be busy （） the test papers after an examination.
A.grading B.naming C.ranking D.grouping
The problem, according to the experts, is （） we should ...
单项选择题The problem, according to the experts, is （） we should do with the salty land.
A.what B.whether C.how D.that
