单选题 He is ______ to be late as he has so many things to do.
  • A. maybe
  • B. probably
  • C. likely
  • D. possibly
【正确答案】 C
【答案解析】[解析] 此题测试to be likely to do…(可能……)的用法。A)maybe(可能)作插入语；B)probably(很可能)副词；D)possibly(可能)副词。这两个副词与后面的不定式没有关系。