题目内容：
I didn't understand at first why he couldn't pass the test, no matter _________ hard he had tried.
参考答案：
答案解析：
单选题：I didn't understand at first why he couldn't pass the test,
- 题目分类：英语三级A级
- 题目类型：单选题
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There is no uniform explanation on what “prompt shipment” or
There is no uniform explanation on what “prompt shipment” or“ immediate shipment
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