请教两道语法

AndyChen_515

10. Even as he wrote copiously on so diverse topics as education ,politics ,and religion,
　　　　　　　　A 　　　　　　　　　B
Lewis Mumford remained active in city and regional planning.
                                                        C                 D

B错在哪里？？

16. ---the surface of metal, but also weakens it.
(A) Not only does rust corrode
(B) Not only rust corrodes
(C) Rust, which not only corrodes
(D) Rust not only corrodes

我选的A，答案D，我死活看不出来哪里错了＝＝可是要是A没错，D也没错又是不可能的……谁能给解释一下？

AndyChen_515

再加一道

21. Laminated safety glass is produced with combining alternate layers of
　　　　　　　　A 　　　　　　　　　　　B 　　　　　　　C
flat glass and plastic.
　D

看不出错误在哪里……

shaoheli

10. Even as he wrote copiously on so diverse topics as education ,politics ,and religion,
　　　　　　　　A 　　　　　　　　　B
Lewis Mumford remained active in city and regional planning.
                                                        C                 D

B错在哪里？？

So => Such

16. ---the surface of metal, but also weakens it.
(A) Not only does rust corrode
(B) Not only rust corrodes
(C) Rust, which not only corrodes
(D) Rust not only corrodes

我选的A，答案D，我死活看不出来哪里错了＝＝可是要是A没错，D也没错又是不可能的……谁能给解释一下？

如果选A的话，后面的那句话应改为but also rust weakens it. 因为它比较的是两个句子。

shaoheli

21. Laminated safety glass is produced with combining alternate layers of
　　　　　　　　A 　　　　　　　　　　　B 　　　　　　　C
flat glass and plastic.
　D

B 错。With =〉By.

AndyChen_515

Thx^_^！