TotakeanumbrellabeforegoingoutseemedtoLondonersacommon...

问题详情：

 To take an umbrella before going out seemed to Londoners a common practice _______, even on rain-free days.

A. to never break     B. never to have broken C. never to be broken  D. never broken

【回答】

C

知识点：非谓语动词

题型：选择题