单选题 Having been ill in bed for nearly a month, he had a hard time ______ the exam.
  • A. pass
  • B. to pass
  • C. passed
  • D. passing


【正确答案】 D
【答案解析】此题考查短语“have difficulty/trouble/a hard time(in)doing something”(好不容易完成某事)。句中动词pass应用passing，故答案为D。