47.
(A) evacuate
(B) fluctuate
(C) degenerate
(D) abbreviate

They can fluctuate between loving and hating the new country.
他們可以在愛和恨新國家之間搖擺不定。

(A) evacuate
to move people from a dangerous place to somewhere safe
（把人從危險的地方）撤離，撤出，疏散，轉移
The police evacuated the village shortly before the explosion.
A thousand people were evacuated from their homes following the floods.
When toxic fumes began to drift toward our homes, we were told to evacuate.

(B) fluctuate
to change, especially continuously and between one level or thing and another
（尤指持續）波動，起伏不定
Vegetable prices fluctuate according to the season.
Her wages fluctuate between £150 and £200 a week.
Her weight fluctuates wildly.

(C) degenerate
to become worse in quality
（品質）下降；退化，衰退
Educational standards are degenerating year by year because of a lack of funds.
What was intended as a peaceful demonstration rapidly degenerated into violence.
someone with low standards of behaviour
墮落的人，頹廢的人
They're just moral degenerates with no sense of decency.

(D) abbreviate
to make a word or phrase shorter by using only the first letters of each word
縮略，縮寫；簡稱
"Chief Executive Officer" is abbreviated as "CEO".

資料來源：劍橋辭典