As we all know, Neil Armstrong was _____ astronaut. And he was also _____ US citizen.

There greatchanges in our city in the past 10 years.

The U.S. government on Wednesday ________ former Commerce Secretary Gary Locke as ambassador to China, making him the first Chinese-American ever to take the post.

You _____park here! It’s an emergency exit. [ ]

On almost all the buses in our city, thereare seats ______ reserved for disabled and elderly passengers.