单项选择题
Which of the following building used tower crane for the first time?（）
A.John Hancock Center B.Chrysler Building C.The Empire State Building D.Marina City
多项选择题 What are the features of a Victorian Brownstone house in Boston?（）
单项选择题 If you husband something valuable, you use it （）。
判断题 Many startups in Silicon Valley are branching out into new places that the trend has a name, Off Silicon Valleying.
