Word of "Wonder"

Like any other language, an English word can have different meanings, depending on the context. Do you understand the following expressions?

• I wonder who's going tonight?
• No wonder so many people skipped class!
• It's one of the wonders of the world.
• Is it any wonder that nobody called her?
• Wonder what Gladys asked me?
• It's just another seven day wonder.
• Do you think it'll happen? I wonder…