11.
(A) opposition
(B) obsession
(C) resignation
(D) recognition

(A)（強烈的）反對，反抗，對抗    n   

There is a lot of opposition to the proposed changes.

The unions are in opposition to the government over the issue of increasing the minimum wage.

the opposition: 對手、反對黨

(B) 困擾；無法擺脫的念頭；念念不忘的事（或人）

an unhealthy obsession with death

obsessed with/by: 著迷

Why are people so obsessed with money?

As a society we're obsessed by sex.

obsess: （使）著迷；（使）縈迴於心

The whole relationship obsessed me for years.

(C) 辭職；辭去（職務）；放棄（工作）

There have been calls for his resignation.

(D) 認可、承認

There's a growing recognition that this country can no longer afford to be a nuclear power.