单选题 ______ we need more practice is quite clear.
  • A. Which
  • B. What
  • C. That
  • D. /
【正确答案】 C
【答案解析】[解析] 此题中that在引导主语从句、同位语从句、表语从句时不省略，引导宾语从句时可省略。