问题
选择题
To turn off my cell phone before going to bed seems to be a rule .
A．to never break
B．never to have broken
C．never to be broken
D．never to be breaking
答案
答案：C
考察句型，rule跟后面的break之间是被动关系，所以选择C
句意为，在上床前把握的手机关掉看起来是一个永远也无法打破的规定。
