He failed to himself to the new environment.A. adaptB. attachC. adoptD. advocate

问题补充：

He failed to himself to the new environment.

A. adapt

B. attach

C. adopt

D. advocate

答案：

(答案→)A. adapt

B. attach

C. adopt

D. advocate

解析：固定短语。adapt oneself to使自己适应….句意：他没有能让自己使用新的环境。