问题补充：
Most people think that it is to spend some time surfing the Internet, but we shouldn be too dependent on it.
A. worth
B. worthwhile
C. worth of
D. worthy of
答案：
A. worth
(答案→)B. worthwhile
C. worth of
D. worthy of
解析：be worth doing/n.“值得一做/值得……”；be worthy to be done/of being done“值得做”；It is worthwhile to do.../doing...“做某事是值得的”。句意：大部分人认为花费一些时间上网是值得的，但是我们不应该太依赖它。故选B项。
