NOTE: In A, B, and C, the phrases "so that" and "in that" would modify some kind of action, as in "He went to the store so that he could find Amy" or "It was a bad move in that it resulted in him getting dumped by Amy." We don't have an action we want to modify here (i.e., the only verb we have in the first half of the sentence is "are", and we're probably not modifying that).
C) the use of water would continue to be restricted because not any appreciable increase in the river's level had
- use of "the use of water" leads to unnecessary passive voice
- "not any.." is unidiomatic and can be replaced by simple "no.."，同D
saying身后的宾语从句that their compliance with laws requiring that turtle-excluder devices be on shrimp nets protect adult sea turtles的主语的核心词是compliance，是一个单数名词，所以该宾语从句的谓语动词也应该是一个单数名词，即，protects。因此，本选项犯了主谓一致的错误。，C同理
fat of a kind需改为a kind of fat。a kind of是一个固定搭配，表示某一种，不能拆分。of a kind表示“同一类，相似的”，显然不符合本题的含义。另外，这里的that of略有赘余的嫌疑，虽然可以比较两种动物的脂肪，但比较两种动物已经足够清楚，所以这个that of可以不必要添加。
E：知识点：was for身后加时间时，意思是“为期”，身后只能加非特殊的时期，例如：
The post was for one year in the first instance.（这个职位是为期一年的）
该例句不能写为：
**The post was for 1997.
这是因为，职位只能为期一段时期，不能为期某个特定的年份（不能说，职位为期1997年）。
因此，本选项中，只能说：
a truce was for a month. （停战协议是为期一个月的）
不能说，停战协议为期奥林匹克开幕的月份。
A的错误在于，of型所有格和-‘s型所有格的区别主要在于物主是人还是物。英语语法规定，只有当物主是人或者动物等“活体”时，才能用-’s型所有格，其余只能用of型，例如：
(1) legs of the table
(2) **table’s legs
(2)的用法是不正确的。在本选项中，festival显然不是一个“活体”，应该用of型所有格，而不是’s型。
(3)-s所有格有时也可用于无生命的东西，主要用于表时间、国家、城市、组织机构、车辆船只以及某些集合名词或度量衡等的名词后。如：
It’s the country’s biggest city. 它是这个国家最大的城市。
for anybody who wants to know the answer, --- by Ron
probably the easiest way to go here is to remember this as an idiomatic usage of the construction "known to". if the action is in the present, then you use "known to VERB"; if the action is in the past, then you use "known to have VERBed". as far as i know, these are the only two possible forms.
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NOTE: In A, B, and C, the phrases "so that" and "in that" would modify some kind of action, as in "He went to the store so that he could find Amy" or "It was a bad move in that it resulted in him getting dumped by Amy." We don't have an action we want to modify here (i.e., the only verb we have in the first half of the sentence is "are", and we're probably not modifying that).