Your smile is one of the strongest tools that make ______ possible for you to meet new people. 

-The girls in blue are our new classmates.　-I know _____.

I have bought a good book, ______ that will surely interest ______ of the students．

—Is this film interesting?—Yes, but I am sure it won't interest________.

. It is no use fishing for golden fish in this river; there are _____ left.