At the last round of competition, Zhang Lei performed Xu Wei's hit song Journey, and won over Chen Zitong, with 66 votes from the media panel, and over 58% support from the _________ audience.
| A．live | B．living | C．alive | D．lively |
（年北京市西城区高三5月二模试题）31. A person who has never tasted bitter won’t know ______ sweet is.
| A．which | B．what | C．when | D．why |
It suddenly occurred to him he had left his keys in the office.
| A．whether | B．where | C．which | D．that |
（年北京市西城区高三5月二模试题）23. It’s been discovered in the study ______ people are more relieved after forgiving others.
| A．that | B．what | C．which | D．whose |
The last time we had great fun was _____ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
（年安徽省合肥市高三第三次教学质量检测）31. What the whole nation cares about most at present is ______ the rescue teams could find the missing plane.
| A．that | B．if | C．why | D．whether |