【题目】The Internet in______you can have a lot of fun can also be a dangerous thing sometimes.
A.which
B.that
C.where
D.when

【答案】A
【解析】考查词引导定语从句。句意：你能拥有很多乐趣的互联网有时候也可能是一件有危险的事情。which代指先行词the Internet，与in一起在定语从句中充当地点状语，故选A。