哪种植物最适合放在室内用来净化空气？（）
A、含羞草
B、郁金香
C、吊兰
D、富贵竹
参考答案：C
33. The employees have not been paid _______ since the new manager took over this company last month.
A．regularly
B．commonly
C．completely
D．Ordinarily
曹操的《______》中说：“慨当以慷，忧思难忘，何以解忧，惟有杜康。
