从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21.---Can you read that, sir? No smoking allowed in the lift!
---_____________.
A.Never mind B. Don’t mention it C.Sure, I don’t smoke D. Pardon me
22. .When she was awake, she found that she was lying on_______seemed to be a piece of stone.
A. that B. which C. what D. it
