语法与词汇 35.Smog-choked Southern California Ademands them. It's a car for people who never want to go to Ba gas station again. But the fact is, for all the talk, selling Cgas-less machines has been a Dhard-sell.
【正确答案】 A
【答案解析】A应改为is demanding。A项的动词应用现在进行时的形式。