多项选择题
What are the features of a Victorian Brownstone house in Boston?（）
A.It has a stoop. B.The facade is built with brownstone or brown-colored bricks. C.It’s often a 2 or 3-story townhouse. D.The facade is built with brownstone only.
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.
单项选择题 What qualities made the Silicon Valley impossible to clone?（）
