单选题 They were ______ to go out for a picnic.
  • A.well-preparing
  • B.well-prepared
  • C.good-prepared
  • D.well-prepare
【正确答案】 B
【答案解析】[解析] 本句意为：他们很愿意外出野餐。这里prepared为形容词，只能由副词well修饰。