问题
选择题
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
答案
答案：D
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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
答案：D