单选题 Salt is a substance that ______ in water.
  • [A] dissolve easy
  • [B] dissolve easily
  • [C] dissolving very easy
  • [D] dissolves easily


【正确答案】 D
【答案解析】[名师精解] 表语substance 由that 引导的定语从句修饰，空格处需填从句的谓语，且 substance是单数，依据从句主谓一致原则，动词也应是单数。