I tried giving up smoking several times before I realized I was already（ ） to it.
A、
adhered
B、
attached
C、
adapted
D、
addicted
【正确答案】：D
【题目解析】：
本题考查词组词义辨析。
adhered to：坚持。attached to：附属于。adapted to：适应。addicted to：对...上瘾。分析语境，在我意识到自己已经对吸烟...之前，我尝试了好几次戒烟。此处，”对...上瘾“符合句意，故选D。
句意：在我意识到自己已经对吸烟上瘾之前，我尝试了好几次戒烟。