单选题 These researchers intend to ______ this research until there is some substantial finding.
  • A. insist on
  • B. call on
  • C. live on
  • D. carry on
【正确答案】 D
【答案解析】[解析] insist on：坚持认为，坚决要求(并非“坚持做”)；Call on：要求，号召；live on：靠……生活；carry on (with)：继续