单选题 ______ at his paper over the weekend, Neil didn't finish it.
  • A. As he worked hard
  • B. Hard as he worked
  • C. How he worked hard
  • D. How hard he worked
【正确答案】 B
【答案解析】[解析] 题干是倒装句，由as引导，表示转折。原句是“Although he worked hard at his paper over the weekend, Neil didn't finish it”。