A．which B．where

　　C．that D．when

　　解析：选B　句意：学校艺术节搭起了一个学生们可以展示他们才华的平台。先行词是stage，关系词在定语从句中充当地点状语，故用where。因此选B。

　　4．I don't know how long ________ will take the workers to build the bridge.

　　A．it B．that

　　C．this D．one

　　解析：选A　句意：我不知道工人们要多久才能建完这座桥。It takes sb. some time to do sth."做某事花费某人多长时间"。

　　5．________to offering better services to the netusers, the company will provide them with all the information they need.

　　A．Being committed B．Having committed

　　C．Committed D．Committing

　　解析：选C　句意：承诺给网络用户提供更好的服务，该公司给他们提供其所需的所有信息。be committed to (doing) sth."承诺(做)某事"，此处作状语，故选C。

　　6．Over 80,000 people competed in the race, ________ it the biggest sporting event in the area.

　　A．having made B．to make

　　C．made D．making

　　解析：选D　句意：八万多人参加了比赛，使它成为了该地区最大的体育赛事。此处为结果状语，make与其逻辑主语构成主动关系，故选D。

　　7．Younger adults ________ older ones are likely to prefer sports and become enthusiastic sports fans.

　　A．other than B．more than

　　C．less than D．rather than

　　解析：选D　句意：是较年轻的成年人，而不是年纪较大的成年人更可能喜欢上运动并成为热情的体育迷。rather than"而不是"，符合语境。

　　8．The Beatles, ________ many of you are old enough to remember, came from Liverpool.

　　A．what B．that

C．how D．as