There is nothing in the world ________ can make him give up his dream.
--- How _______ is it from Xi'an to Dunhuang? --- It's less than 3 _______ flight.
He has _______ for two years.. Two years _______ a long time.
When you feel helpless and_______, just remember you are not_______ in the world because your friends are around you.
- Is Central Park_______ largest city park in the USA?- Yes. It is_______ perfect place for people to rest after_______ hard day's work.
Would you please give me_______ my English study?