单选题 What does the author want to emphasize in the first paragraph?

单选题 What did researchers find about popular culture?

单选题 What does the author propose people do?

单选题 The supermarkets should hire staff who can speak English to serve foreign customers and staff should(　　)encouraged to take the ____ in offering help to customers. 

单选题 Due to the European debt crisis, China’s exports were ____ during the first two months of this year, and February also saw the largest trade deficit in the past two decades. (　　)

单选题 An initial investigation indicated that poor construction and maintenance compounded by heavy rains and strong winds were to ____ for the collapse of the wall. (　　)

单选题 The Mega Millions lottery created(　　)____ across the country, with people rushing to buy the 1$ tickets in time for(　　)shot at the humongous jackpot. 

单选题 What do we learn from the passage about vegetable planting?