28. ____well prepared you are ,you still need a luck in mountain climbing .
With a lot of difficult problems _________, the newly-elected president is having a hard time.
I still remember _______ to the Tian’anmen Square and what I saw there.
More highways have been built in China,________ it much easier for people to travel from one place to another.
I was in the middle of my call because I had no more coins to put in the box.
The students running on the playground are all in their uniforms, so it’s hard for you to_____ my sister in them.