22.----I' m smy, I didn' t mean to put you to so much trouble.
----__________
| A．It' s my pleasure ! | B．No trouble at all． |
| C．I'm really sorry! | D．You're welcome． |
（届四川省成都树德中学高三3月阶段性考试英语试卷）
——where did President Xi Jinping have steamed dumplings?
_____It was at the Qing Feng Steamed Dumpling Shop _____ he lined up with other customers.
| A．That | B．in which | C．where | D．when |
（届福建省漳州市八校高三第三次联考英语试卷）
—Where did you find our chemistry teacher?
—It was in the lab ______ he was doing his experiment.
| A．that | B．where | C．which | D．in which |
（届天津市十二区县重点校高三第一次模拟联考英语试卷）
The course normally attracts 20 students per year, ____ up to half will be from overseas.
| A．in which | B．of whom | C．of which | D．for whom |
（2014届浙江省宁波市十校高三3月联考英语试卷）
The black baby boy is at the stage he can only say a few simple words but not yet full sentences．
| A．when | B．where | C．which | D．why |
（届北京市顺义区高三3月统一测试英语试卷）
The past year has seen people around the world honoring Nelson Mandela, _____ passed away on Dec 5 at the age of 95.
| A．who | B．which | C．that | D．when |