Mr. Wang decided to devote all his time_______ his spoken English before going abroad.
I still remember________to the Famen Temple and what I saw there.
In some cities the traffic police use computers to keep the traffic________smoothly.
Last weekend Peter had a great deal of fun with his family________kites in a park.
It is no use________without doing.
—Can't we go there on foot? —________to take a boat.