89.B
be checked; examining
need 接动名词主动形式,表示被动意义、这时动名词和主语之间有动宾关系,need doing 可转换为 need to be done 结构,意思相同.即：need examining= need to be examined
90.A.
含有“同位语从句”的复合句.
主句：There is no doubt at all.
同位语从句：...that he can finish the homework in time
英语语法89.Every day each file has to ( ) and the mails need ( )
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