【题目】While advertisements are of great help, I don't think we should entirely ________ them.
A.insist on
B.rely on
C.keep on
D.catch on

【答案】B
【解析】句意：尽管广告很有用，但我认为我们不应该完全依赖广告。rely on “依赖；依靠”，符合题意。insist on “坚持”； keep on “坚持”； catch on “理解”。