It wasn't until nearly a month later ________ I received the manager's reply.
A.sinceB.whenC.asD.that在线课程D
解析：本题考查强调句，被强调部分为not until nearly a month later，为时间状语从句，故须选择that．
命题立意：强调句是高考题考查热点之一，判断一个句子是否是强调句，可以将It is/was… that…去掉，看剩余部分句式结构是否完整，句意是否明了，若是，则为强调句型，其引导词多用that．(被强调部分指人时可以用who)