―Do you know where David is? I couldn’t find him anywhere.―Well. He ______ have gone far — his coat’s still here.

All the class keep quiet _________ the class begins.

Which hat do you like___, the blue one or the brown one—The brown one.

________ at Taiwan magician Liu Qian’s magic show, many students have fallen in love with the art[ ]

Thousands of people _______ to watch yesterday’s matchagainst Ireland.