Question

10. Is this the reason at the meeting for his

carelessness in the work?

   A. he explained   B. what he explained

   C. how he explained   D. why he explained

Answer 1

10. A

10. A解析：考査定语从句关系词的选 用。首先将题干疑问句变成陈述语序， 即:This is the reason...，分析句子结构 可知先行词为the reason ,引导词作从 句中explain的宾语，可用that ,又因关 系代词充当宾语时可以省略，故答案为 A项。