Liu Xiang has failed over and over again in the past years. And that's _________ he succeeds.

A :Is there _______ in today’s newspaper?B: Sorry, nothing.

Gary: I can’t find my pen.   Nina: Is the one on Jack’s desk 　　　? Gary: Yes, Thank you. 

— Who will teach _______ oral English next term? Can it be a new teacher?— Perhaps. But our head teacher hasn't told us ________ .

Jack is a boy, ______ last name is Brown.