21. Will you please keep _____, Tom? Your father is sleeping in the room.
A. calm B. silent C. quiet D. still
22. Five passengers were _____ in the traffic accident and they have all been taken to the nearest hospital.
A. injured B. damaged C. destroyed D. ruined
23. Alice trusts you; only you can ______her to give up the foolish idea.
A. insist B. advise C. suffer D. persuade
