12.It was only _ we understand was said to

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12.It was only _________ we understand ________ was said to us ____ we began to start our work.
A.what; that ; when B.when; what; that C.what; what; that D.that; what; when
15.The quake ________ in Beijing,_______ is one hundred kilometers away.
A.was felt; which B.felt; where C.was felt; that D.felt; which
a

12.
B.when; what; that
首先可以确定第二空：________ was said to us这个从句是作understand的宾语,因此是宾语从句.这个宾语从句缺少主语,所以横线上要填一个名词或相当于名词的词.只有what可以满足这一要求.when只能在从句中充当时间状语；而that引导宾语从句时不能在从句中充当任何成分.
这个句子是一个it的强调结构：“it was only +被强调部分+that+其余部分”.因此第三空是填that.
注意：it的强调结构中的it was/is和that这三个单词拿掉后,句子仍然完整.
现在来分析第一个空：_________ we understand what was said to us这个从句不缺主谓宾,因此横线上只能是状语.而what只能在从句中充当主宾表语.因此排除what.
15.A
第一空：前一半是主句,quake与feel是被动关系,排除B、D.
当feel作“觉得”解,后面接形容词时,是系动词,此时它没有被动语态.
当feel作“感觉到”解,后面接名词时,是实义动词,而且是及物动词,此时它可以有被动语态.
第二空：which引导非限制性定语从句,that不能引导非限制性定语从句.排除C.

12.It was only _________ we understand ________ was said to Not only ________ difficult to understand,but it was too lon It was said that his mother _________. 一道改错题："It was nice to talk to you."said he before we said go He said it was _________ impossible to buy the novel which w It was not easy for us to understand that( ) when we were yo 1,We went to the cinema.We saw a great film.It was _________ 英语单选题It was dark.We decided to ________ for the night at a f 6.It was all ________ to attend the training course since we impossible/it/to understand the words/almost/for me/was 英语翻译．He said it was a strange visit．“I don’t understand，but it was said that he-------[choose]to go to tibet