Plans have been proposed ______ the largest dam in the world to be built along the Congo river.
The Summer Palace is one of the ___ beautiful parks in Beijing. I suggest you going there to have a visit.
She rubs her teeth with her finger _______ she wants to brush her teeth. This is done after every meal.
This gentleman is very interested in singing. He often goes to the Karaoke hall with his friends and sometimes comes home very late, _____, very early in the morning.
Should the wallet, found in the street, be put into a pocket _______ turned over to the policeman?
After having failed many times, the young man refused to try it _______.