C.there is an uncovered manhole ahead
D.a police officer suggests that they do so
解析:推理判断题。第三段里提到,车里装的计算机软件能够识别交通信号灯。A项文中没有提到。由第六段倒数第二句“Butifthemanhole(下水道入口)aheadisuncovered,theydriveoveritwithouthesitation.”可知C项错误,由第六段最后一句“Also,ifapoliceofficerwavesatthesideoftheroadtoasktraffictostop,thecarscannotunderstandhim.”可知D项错误。
答案:B
7.What’s one of the “problems” facing driverless cars according to the article?
A.How to make them run faster.
B.How to improve their detection technology.
C.How to power the cars using greener energy.
D.How to guide the cars when the GPS fails to work.
解析:细节理解题。由第六段第一句中的“...saidthatthisisbecausethedetectiontechnologyisnotyetgoodenoughtoseparatecertainobjectsfromweatherconditions.”可知应选B项。
答案:B
8.What best describes Urmson’s attitude toward the development of driverless cars?
A.Excited. B.Worried. C.Doubtful. D.Optimistic.
解析:观点态度题。由第七段中他说的“...happenmorequicklythanpeoplethink...”可知,他对无人驾驶汽车的前景还是比较乐观的。
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