— _________ has Liu Xiang taken part in world’s competitions of 110-metre hurdles?— I’ve no idea. Let’s find it out on the Internet.

I think Jack does his homework _________ than anyone else in his class.

--- ______ do you play football?　 --- Once a week.

 — Your dress is really beautiful. _______ is it ?—It’s $120.

— How          will the boss be back? — In these days.