34.－Hi,Bruce.Here’s a letter for you.－Thanks.Iwonder_________.A.who that letter was from B.who was from that letterC.who was that letter from D.who from that letter was选哪个 为什么?我选的C但是答案是A 不是说宾语从句用陈

34.－Hi,Bruce.Here’s a letter for you.
－Thanks.Iwonder_________.
A.who that letter was from B.who was from that letter
C.who was that letter from D.who from that letter was
选哪个 为什么?我选的C但是答案是A 不是说宾语从句用陈述语序吗?

答案选A.
的确是陈述语句.
亲没有明白这个短语,a letter is from sb. 谁的来信
问句是：who is the letter from?
陈述句：the letter is from who
宾语从句保留特殊疑问词做先行词,右面按照陈述句的写,（即把陈述句的疑问词提前即可）于是
who the letter is from