第二部分英语知识运用 第一节 单项填空(共15小题;每小题1分,满分15分) 从A、B、C、D四个选项中,选出可以填人空白处的最佳选项,并在答题卡上将该项涂黑。 21. I like to live in a room ________ window faces to the south. A. which B. whose C. that D. Where
—Do you know the mission of the volunteers?
—No. But I think _____ they will end up doing there will promote public awareness of environmental protection.