问题: Is this the reason _____at the meeting for this careless in his work?
A.he explained B. why he explained
分析哦
解答:
Is this the reason _____at the meeting for this careless in his work?
A.he explained B. why he explained
选A
理由是：
reason 在定语从句中做explain的宾语。在这个定语从句中关系代词that/which省略了。
Eg：
1. Is this the reason why he was late again？
2. Is this the reason that/which he explained to you？
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