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

【参考答案】

A应改为is demanding。