that was the most worrying piece of news i would heard in a long time什么意思

The Town Hall____ in the 1800's was the most distinguished building at that time.~

C
那个镇的一个完成于19世纪的大厅是那个时代最独特的建筑。
A.to be completed不定式表将来，将要被完成
B.having been completed已经被完成，但注意having done的形式只能做时间状语，而此处要选定语
C.completed过去分词表被动和完成
D.being completed 正在被完成
由题意知是已经被完成，做定语，所以选C

观察空格所在的 that 从句，找出这个句子的主干，发现它的意思就是要表达什么东西是值得的。而介词 in 所带的词组正是修饰这个什么东西的。答案中 A 选项 apprehension 是忧虑、领悟的意思，带人主干显然不合意思。 B 选项中的 appreciation 是欣赏、领会的意思。 C 中的 presentation 是提供、表演的意思，这些词带入原句都不符合题意。只有 D 选项中的 participation 能与后面的词组相搭配，整个从句的意思是整个时期最引人注意的医学实验是值得的，这样句子才通顺

那是我很久以来大概所听到的最揪心的消息。（原句有误，应该 是“... I would have heard ...")
关键词语：the most worrying piece of news最揪心（令人担心）的消息；I would have heard是定语从句，修饰the most worrying piece of news，I 前面省略了关系代词that; would是情态动词，表示推测, 可用于谈论过去，也可用于谈论现在(语气较will委婉, 比较不确定。), 意思是“大概、可能、应该等”；will / would +完成式（即have+过去分词）表示对过去可能已经发生的情况进行推测; in a long time 表示“很长时间、好久、很久、很久以来，有一段时间”。例如：
This car will / would hold six people. 这辆小汽车大概可以坐六个人。
He will be waiting downstairs now. 他现在应该在楼下等吧!
That would be in spring 1964. 那大概是1964年春天的事情。
You will / would have heard the news, I think? 我想，你已经听到那个新闻了吧?
I thought you would have finished it by now. 我想你现在可能已经做完了吧。
It's the best news I've heard in a long time. 这是我很久以来听到的最好消息。He hasn't seen you in a long time. 他很长时间没有见到你了。
I haven't had any contact with my family in a long time. 我和家里人已经很久没有联系了。
I haven't updated my bankbook in a long time. 我有一段时间没去打印我的银行存折了。

that was the most worrying piece of news i would heard in a long time
这是我会在很长一段时间里听到的最令人担心的消息，

that was the most worrying piece of news i would heard in a long time
这是最令人担心的消息我听到很长一段时间
这是最令人担心的消息，我会在很长一段时间里听到的
这是最令人担忧的一则新闻，我会听到很长一段时间
这是最令人担心的消息，我会在很长一段时间里听到的
这是我会在很长一段时间里听到的最令人担心的消息，

百度翻译为：

that was the most worrying piece of news i would heard in a long time
这是最令人担心的消息，我会在很长一段时间里听到

那将是我听到的最让人担心的消息，我今后很长一段时间里还会听到。
严格地说： that was the most worrying piece of news i would heard in a long time 愿句 中 would heard 为 would + heard (heard 是 hear 的 过去式或过去分词） ， 正确的应该是 would have heard 。

那是很长时间以来我听到的最令人担忧的消息。

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门头沟区14768149340： That was the most beautiful city we______.A.have visited B.had ever visited - ？
阚萱益肝：[答案] B 句子是过去式 那么过去的过去就是过去完成时

门头沟区14768149340： had ever 和 have ever有什么区别That was the most beautiful caity we A had ever vistedB have ever visted选哪个呢?原因 - ？
阚萱益肝：[答案] 选B.那是我们曾经到过的最美丽的城市. A had ever visted :过去完成时(had+过去分词),表示两个事件中一个发生在前或是表示较早的过去.常与already、even、just、for+时间段、never连用. She went on holiday after she had taken the exam. 她考...

门头沟区14768149340： he was asked of all the syories he had read (that) was the most interesting.填that对吗? - ？
阚萱益肝：[答案] 用which..

门头沟区14768149340： it was metal money that was the most popular - ____ - of paper momey. - ？
阚萱益肝：[答案] instead of 代替,而不是

门头沟区14768149340： 几道高中英语改错题,求助英语强人下列各句中均有一处错误,请指出并改正.She said that was the most interesting thing she has heard by then.________My ... - ？
阚萱益肝：[答案] 下列各句中均有一处错误,请指出并改正.She said that was the most interesting thing she has heard by then.__has→had,前面是said,后面的时态要变化My friend asked me where I was going on holiday next month....

门头沟区14768149340： 告诉我Most的用法,并说明理由That was the( )boring film I've ever seenIt's strange,beacuse( )of my friend enjoyed itIt was one of the( )longest films I've ever ... - ？
阚萱益肝：[答案] 1最 2绝大多数 3最 4绝大多数 5最6绝大多数

门头沟区14768149340： 完形填空. 完形填空.      The most important match was held yesterday afternoon.That was the last match in the league (联).Until yesterday our team ... - ？
阚萱益肝：[答案] 1-5 CBDCA 6-10 CDBCA

门头沟区14768149340： 哪个答案正确That dinner was the most expensive meal we had never had.还是That dinner was the most expensive meal we had ever had. - ？
阚萱益肝：[答案] 那顿晚饭是我们吃过的最贵的一餐饭. 经历之最,have ever had,had ever had,中间只能用ever,曾经有过的,不能用never.

门头沟区14768149340： 汉译英 那是我有事以来过的最快乐的一次 it was the most fun that----------------- - ？
阚萱益肝：[答案] It was the most fun that I have ever had.

门头沟区14768149340： That dinner was the most expensive meal we_______选择填空A.had never had B.had ever had 选哪个,为什么 - ？
阚萱益肝：[答案] B 因为前面有was...表示过去的过去...所以用过去完成时 其次是和你以前吃过的饭的价钱相比较.