来源：学生作业帮 编辑：搜狗做题网作业帮 分类：英语作业 时间：2024/08/05 00:59:43
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
为什么选D而不是B
解题思路： 非谓语动词
解题过程：
这里是现在分词做状语.相当于一个时间状语从句.即:when he was passing the exam.
最终答案：略
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