I’ve asked several people what happened, but no one will give me a          answer.

If you are going to stay in the United States for longer than a(n) ______ visit, you may be interested in learning more about its people and culture.

______ and short of breath, Andy and Ruby were the first to reach the top of Mount Tai.

Recently our government policymakers are very _______about the rapidly rising food costs. 

No one can deny that it is ______ that many more residents could have been injured if the building had fallen at midnight.