【正确答案】 B

【答案解析】解析：ally(with)vt．使结盟(如：Britain has been allied with Portugal for many centuries．Will the workers of the factories ally against the big employers?)。attach(to)vt．使附属，使依恋。gear(to)vt．使适应，使适合。adapt(to)v.(使)适应，(使)适合。