By law,when one makes a large purchase, he should have _____ opportunity to change his mind.

Then moment _________ Mary will always rememberis _________ Mr. Black gave her a lot of valuable advice on how to improve herwriting.

－Why was he late for school yesterday－He overslept. By the time he got to the bus stop, the bus _________ already _________.

_______ Japan’s nuclear crisis will be solved in 2011 is not known yet.

The boy ___ is wearing the blue jacket is Jim.