单选题 The visiting headmaster expressed his satisfaction with the talks, ______ that he had enjoyed his stay here.
  • A.had added
  • B.to add
  • C.adding
  • D.added
【正确答案】 C
【答案解析】[解析] adding在这里是现在分词作伴随状语；若选D，应改为and then he added...。