两道选择 谢谢 1 ( ) made me sick was the water I drank from the tapA what B that C which D who 2.( ) is most difficult in orienteering is to run and look for your way at the same timeA that B all that C what

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两道选择 谢谢 1 ( ) made me sick was the water I drank from the tapA what       B that       C which     D who 2.(       ) is most difficult in orienteering is to run and look for your way at the same timeA that      B all that       C what

两道选择 谢谢 1 ( ) made me sick was the water I drank from the tapA what B that C which D who 2.( ) is most difficult in orienteering is to run and look for your way at the same timeA that B all that C what
两道选择 谢谢 1 ( ) made me sick was the water I drank from the tap
A what B that C which D who
2.( ) is most difficult in orienteering is to run and look for your way at the same time
A that B all that C what D all what
请一定 详解 谢谢

两道选择 谢谢 1 ( ) made me sick was the water I drank from the tapA what B that C which D who 2.( ) is most difficult in orienteering is to run and look for your way at the same timeA that B all that C what
1.A主语从句,what表示使我恶心的东西
2.C也是主语从句,

1. A :这个句子系动词有了,表语也有了,缺的就是主语,而句子的主语就是由what引导的一个从句来充当的;what在从句中也做主语。
2. C :这解释同上。

同意楼上的观点,what引导的主语从句。