_____the problem of land erosion getting more serious, the government is searching for a way to deal with it.
It is no ____ arguing with Bill because he will never change his mind.
Joan together with her parents ____ going to visit the Summer Palace this Saturday.
The summer holiday is just ____ the corner. How do you plan to spend it?
____ hands and knees Helen Thayer got the tent up.
The woman looks so worried. She seems ____ something valuable.