求教sat的句子改错题，很紧急！

personperson33UID: 2368236

求教sat的句子改错题，很紧急！
4 Q/ ^, x/ P" ^# P, M$ E1）Because the owl is usually nocturnal plus being virtually noiseless in flight, it is seldom seen by casual observer. No error
/ Q4 t% @! |' ^7 u1 x$ v, F我知道plus being错了，但错在哪？
2）The book is essentially a detailed and very well documented record of what happened to each of the protesters. No error
+ ]) O, _, ~1 J. D" G7 _答案为no error，但为什么is essentially对了，而且very well documented也对，有点不解。
. I2 ?# ?. r; ^1 v4 L3）Experts agree that permanently modifying eating and exercise habits rather than merely dieting for brief period are the key to controlling weight.
$ _" q) k9 |, Y% ~9 o1 I4 `! L为什么是are the key错了，我觉得是to controlling，不是to control吗？
: q6 R9 F+ F" Q' ]4 }, \9 d4）Long thoughts of as a quiet, stuffy place where people just borrowed books, libraries have been changing their images dramatically over the last few years.
. f8 N, C# {  m- L, Q  Y/ ]( w应该将place改为places，但为什么不同时把quiet，stuffy改为quiet and stuffy

stfreezeUID: 2229135

1）MS没这个用法。。。
; n' W$ A) Z& c# p4 a! ?6 y2）没错阿。。。你觉得哪里错了。。。
3）key to something,所以to controlling 没错
# L. m4 Y. |1 ?4）places对应libraries,负数；quiet, stuffy没错阿

HeswingUID: 2218592

１ 一般不用plus，一般用and.你用了and，就应该是个平行对吧．后边的being就不对了，而且在句子里边有being就是不简洁的，一般不对．
7 ^9 v6 N  l9 i; p5 I２ essentially 和very well平行，没有错．
9 K2 E" g" ~/ U- y0 H３不要能说are the key，怎么也应该是are the keys吧，前边是复数．不过我怎么没有见过are the keys这种说法啊，不知道，等高人回答吧．
４同意楼上的，不多解释了:handshake