题目

Read the following passage. Summarize in no more than 60 words the main idea and the main point(s) of the passage. Use your own words as far as possible.The Power of iPhoneThough Apple released data last week indicating iPhone sales may, at last, be slowing, one CEO recently explained why he thinks the smartphone has overturned our expectations of basically everything.Harry West is the CEO of the global design and strategy firm Frog, which works with its clients to anticipate(预料)the future. In a conversation with The Huffington Post at the World Economic Forum in Davos, Switzerland, West cThe light is still on. They ___ to turn it off when they left the room. A．must forget B．could have forgotten C．may forget D．must have forgotten