Kathy ______ a lot of Japanese while working with some Japanese engineer.
___________ by thick bamboo, the cottage is hard to find.
He has ____________ himself to be innocent (无罪的).
Everybody in our class admires Lily, for she has a __________ for playing the piano.
__________ you’ve got a good chance, you should make full use of it.
. _________ is known to us all is that 2012 Olympic Games will take place in London.