It's not the ___(one) time you walk ___(cross) the field.
问题描述:
It's not the ___(one) time you walk ___(cross) the field.
答
first,have crossed
固定句式,It is the first(second、third...) time (that) sb.have/has done sth.
It was the first (second、third...)time (that) sb.had done sth.