Never did we have to play "stand up", "sit down", "speak out". I don't ____ one student who didn’t try his best.
Who would you rather ______ with the teacher about the problem?
When _____ the letter, tears came to her eyes.
Did he find _____ hard to learn a foreign language?
The computer system _____suddenly while Paul was searching for information on the Internet.
___ Mr. Smith is waiting to see you. He appears to be quite____ important person.