填空题 Smog-choked Southern California (demands) them. It's a car for people who never want to go to (a) gas station again. But the fact is, for all the talk, selling (gas-less) machines has been a (hard-sell). A. demands B. a C. gas-less D. hard-sell
  • 1、
【正确答案】 1、A应改为is demanding。    
【答案解析】[解析] A项的动词应用现在进行时的形式。