请英语老师指导：13.We can easily get from the computer( )has been st

13. 答案：A.
翻译：我们可以轻易地从电脑中得到被存储在其中的信息.
解释：该题含有一个固定搭配：get A from B“从B中得到A”.
只不过它采用了一个倒装的句序,变成了get from B A,原因是因为该题中的A是一个较长的宾语从句.
即：get from the computer (what) has been stored in it
= get (what) has been stored in it from the computer
其中的A即what has been stored in it,而B即the computer.
如果用that引导该宾语从句,则that在宾语从句中不能做成分,但是该句明显缺少主语；
which引导宾语从句的话,则其意为“哪一个/些”,要求上下文中必须有选择范围；
如果单独用anything做get的宾语,则has been stored in it为定语从句,必须加入关系代词that代替anything做定语从句的主语,且不能省略.
that引导的从句一般是两种,一是名词性从句（包括宾语/主语/表语/同位语从句）,此时that在从句中只起引导作用,不能做任何成分.
如：I don't know (that you were sleeping). 宾语从句
(That the earth is smaller than the sun) is known to us all. 主语从句
Have you heard the news (that he has gone abroad)? 同位语从句
The truth is (that he died last night). 表语从句
二是定语从句,此时that代替先行词（即被定语从句所修饰的名词/代词/句子）,在定语从句中一般充当主语/宾语/表语,指代事物/人.that做定语从句的宾语时,有时可以省略.
如：This is the city (that I visited last year).
关系代词that等于先行词the city,在定语从句中充当visited的宾语,可以省略.
This is the city that is called Eastern Paris.
关系代词that等于先行词the city,在定语从句中充当主语,不能省略.
2. C
翻译：再三考虑过后,他做出决定：放弃/不再学习历史.
解释：to give up studying history是后置定语,修饰该句的宾语decision,即“...的决定”.因为这只是一个决定,在当时并未发生,所以用不定式短语来充当后置定语,因为不定式一般表示尚未发生的动作,如hope to do sth,want to do sth,decide to do sth, plan to do sth,make a decision to do sth等；
固定短语give up doing sth,意思是“放弃做某事”.