A big step ____ to strengthen China’s health care systems since we launched an effort in 2008.
I think that ____ very difficult to learn.
---_______to you _______your great success! ---Thank you very much.
Distinguished guests and friends . _____the ceremony of the 50th Anniversary this morning are our alumni (校友) from home and abroad .
It is very ___that the factory will have to close because the economic crisis .
____was a time ____women had no right to vote .