英语翻译If we were asked exactly what we were doing a year ago,w

英语翻译
If we were asked exactly what we were doing a year ago,we should probably have to say that we could not remember.But if we had kept a __(1)__ and had written in it an account of __(2)_ we did each day,we __(3)__ be able to give an answer __(4)__ the question.
It is the __(5)__ in history,many things have been __(6)__ because we do not have any __(7)__ account of them.Sometimes men did __(8)__ a record of the most important _(9)__ in their country,but often it was _(10)_ by fire or in a war.Sometimes __(11)__ was never any written record at _(12)__because the people of that __(13)__ and place did not know __(14)__ to write.For example,we know a good __(15)__ about the people who lived in China 4,000 years ago,__(16)_ they could write and leave written records for those who _(17)_ after them.But we know almost _(18)_ about the people who lived even 200 years _(19)_ in central Africa,because they had not learned to _(20)_.
1 A paper B book C promise D habit
2 A which B that C how D what
3 A shall B could C will D should
4 A to B of C for D about
5 A question B fact C past D same
6 A dismissed B gone C forgotten D passed
7 A clear B true C interesting D written
8 A keep B write C obtain D break
9 A events B people C findings D materials
10 A burned B missed C broken D destroyed
11 A it B that C there D this
12 A all B last C least D once
13 A country B kind C nationality D time
14 A when B which C what D how
15 A deal B amount C lot D many
16 A because B if C when D although
17 A follow B lived C read D settled
18 A anything B everything C nothing D something
19 A ago B later C before D ahead
20 A live B keep C write D know

1.A (keep a paper/diary 记日记)
2.D（what we did 作of的宾语,构成介宾结构）
3.B（虚拟语气中的时态交错,前句是对过去的虚拟,后句是对现在的虚拟）
4.A （the answer to the question 固定搭配）
5.B （it is the factory in history这是历史上的事实）
6.C（句意是“由于人们不记日记,很多事物都被人们忘记了”）
7.D（同上）
8.B（文章倒数第三行“written record”做了提示）
9.A（句意“有时人们确实会记下他们国家的最重大的事件”,event通常指重大事件）
10.A（by fire 做了提示）
11.C（there be 句型）
12.A（at all (否定句)丝毫,根本）
13.D（句意“因为那个时代和那个地方的人们不知道该记录下什么”）
14.C（同上）
15.B（a good amount of 修饰不可数名词的“许多”）
16.A（句意“人们知道四千年前居住在中国上的人的许多事是因为他们留下了许多书面记录给他们的后人阅读”）
17.C（同上）
18.C（句意“人们几乎不知道两百年以前中非的任何事”）
19.A（同上）
20.C（句意“人们几乎不知道两百年以前中非的任何事是因为他们当时还没学会书写”）
再问： 您回答的很详细，就是~~弱弱的问一句，保证对不？
再答： 嗯
再问： 多谢您的回答，我2、3、11、15选项为什么选这个还不是很了解，能否请您给我详细的再解答一下，考点~~考的是什么？以后遇到了应该如何分析如何做？万分感谢~~~~~。
再答： 2.这个空要联系上下文句意，上下文的意思是“如果我们被问及一年以前的这个时候我们在做什么，我们很可能不得不说我们不记得了，当时如果我们能记日记并把我们每天所做的事都记下来，那么我们将能够给出回答。” 3.这个空涉及到虚拟语气中的时态交错（也可称为“错综时间条件句”） 在这里的使用是If sb had done sth,sb would might do sth/sb could do sth/sb should do sth (前句是对过去的虚拟，后句是对将来的虚拟) “如果我们过去能记日记并把我们每天所做的事都记下来，那么我们将能够给出回答” 11.there be句型，原句是“there was a written record”,在这里作者用了否定形式。 15.“人们对四千年前居住在中国上的人很了解”其中“了解”是不可数的，所以用a good amount of 修饰不可数名词"许多"