It is very _______ of you to speak in front of all those people .

Don’t worry, sir. I’m sure I can run _________ to catch up with them.

The old man lives ____ in the countryside, but he doesn’t feel_____ because he chats with his children on the Internet every night.

 I know this plan is far from perfect. But I really can’t think of ______one.

—I want to be an astronaut like Yang Liwei when I grow up.—That sounds ____. I hope your dream can come true.