问题
选择题
More than seven in ten get angry ________ to wait longer than one minute for a web page to be downloaded.
A．if forced
B．unless forced
C．once forcing
D．until forcing
答案
答案：A
考查省略结构。if forced =" if" they are forced。句意：超过十分之七的人会生气，如果他们等待网页下载超过一分钟。
