单选题 In order to improve our standard of living, we have to {{U}}accelerate{{/U}} production.
  • A. involve
  • B. decrease
  • C. speed up
  • D. give up
【正确答案】 C
【答案解析】[解析] 考查动词。题干划线词accelerate意为“加快”，所以正确答案为C。