The cellphone, a device we have lived
with for more than a decade, offers a good example of a popular technology's
unforeseen side effects. More than one billion are {{U}}(1) {{/U}} use
around the world, and when asked, their {{U}}(2) {{/U}} say they love
their phones for the safety and convenience {{U}}(3) {{/U}} provide.
People also report that they are {{U}}(4) {{/U}} in their use of their
phones. One opinion survey {{U}}(5) {{/U}} that "98 percent of Americans
say they move away from {{U}}(6) {{/U}} when talking on a wireless phone
in public" {{U}}(7) {{/U}} "86 percent say they 'never' or 'rarely'
speak {{U}}(8) {{/U}} wireless phones" when conducting {{U}}(9)
{{/U}} with clerks or bank tellers. Clearly, there exists a {{U}}(10)
{{/U}} between our reported cellphone behavior and our actual
behavior. Cellphone users—that is to say, most of us—are
{{U}}(11) {{/U}} instigators and victims of this form of conversational
panhandling, and it {{U}}(12) {{/U}} a cumulatively negative effect on
social space. As the sociologist Erving Gotfman observed in another
{{U}}(13) {{/U}} , there is something deeply disturbing about people who
are " {{U}}(14) {{/U}} contact” in social situations because they are
blatantly refusing to {{U}}(15) {{/U}} to the norms of their immediate
environment. Placing a cellphone call in public instantly transforms the
strangers around you {{U}}(16) {{/U}} unwilling listeners who must cede
to your use of the public {{U}}(17) {{/U}} a decidedly undemocratic
effect for so democratic a technology. Listeners don't always passively
{{U}}(18) {{/U}} this situation: in recent years, people have been
pepper-sprayed in movie theaters, {{U}}(19) {{/U}} from concert halls
and deliberately rammed with cars as a result of (20) behavior on
their cellphones.
【答案解析】本题的考点为上下文句子结构辨析。根据上文，they love their phones for the safety and convenience(他们因为其安全性和方便而喜欢手机)此处是一个定语从句，即the safety and convenience(that) they provide．句中的they指的是phones。其余选项不能与provide构成主谓搭配。
【正确答案】
C
【答案解析】本题的考点为形容词的词义辨析，此句意思是：有礼貌的使用电话。根据下文“98 percent of Americans say they move away from…”可知C为正确答案。其余选项：A careful小心地；B．careless粗心的；D．cautious谨慎的，均不符合题意。