We must create a safe and ______ international environment of lasting peace.

I hope they will finish the project in time, but they themselves are very_____ that it will.

–We should use      methods to deal with different incidents. You know, anything can happen in that situation.–I got it. Thank you for reminding me.

---I heard that he grew worse after taking the medicine．---Yes．He was ___________to it．                          

The first African-American president of the United States received a（n） _____ welcome in the African countries, where he was received as a returning son．