问题描述:
Havinhg been ill in bed for nearly a month,he had a hard time ______ the exam.
A pass B to pass C passed D passing
这里为什么选D啊,D在这里作什么成分呢
A pass B to pass C passed D passing
这里为什么选D啊,D在这里作什么成分呢
问题解答:
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