C．dead time D．uncertainty

　　解析：选A　词义猜测题。根据第一段中的"Jack Ma's net worth increased by $2.8bn overnight"和第三段中的"China's largest e­commerce company forecast 45 to 49 per cent revenue (收入) growth in the year ending March"可以推测画线词意为"急剧上升"。

　　6．What do we know about Alibaba?

　　A．It is China's largest social media company.

　　B．It makes profits mainly from digital advertising.

　　C．It is providing cloud computing services.

　　D．It is new to streaming music and video.

　　解析：选C　细节理解题。根据第四段的第一句"Alibaba and Tencent, which dominate online shopping and social media respectively, have ventured (冒险) deeper into new areas from cloud computing services to streaming music and video ..."可知，由于国家经济下滑，阿里巴巴已进军云计算服务领域。

　　7．What does Jack Ma stress in the last paragraph?

　　A．The investment of global trade.

　　B．The importance of data.

　　C．The necessity of sharing information.

　　D．The future of the Internet of Things.

　　解析：选B　推理判断题。根据最后一段的最后一句"In the future, no company, no country, no business can survive without data."可知，在将来，任何公司的发展和存在都离不开数据，因此他强调了"data"的重要性。

　　C

　　(2018·华南师大附中模拟)Many years ago, when we were a young couple with two small children, aged 2 and 4, we were practically impecunious. My parents­in­laws lived from hand to mouth, so we didn't expect any help from them. My parents lived a great distance away, and I was too ashamed to let them know about our situation.

　　My husband was trying to earn a living with an old pick­up truck, carrying groceries for local shopkeepers, but it was constantly breaking down. It took almost all the money we had to have it fixed. The truck was also the only means of transportation for us.

We lived in the countryside, and we always used the back door because the driveway led to it. One winter evening, I stepped outside to take a bag of trash to the barrel and almost tripped over something. It was nearly dark, and I had to bend down to see what it was. I