选a bcd 排除的原因是不能用visit to sb, 而是直接visit sb
而a 中的visit是名词形式
___to Jane's parents, Tonny looked a bit nervous and upset.
A.This being his first visit
B.This being hisfirst time to visit
C.Having never visited before
D.Never having visited
选a bcd 排除的原因是不能用visit to sb, 而是直接visit sb
而a 中的visit是名词形式