Question

ДАЮ 45 БАЛЛОВ
ПОМОГИТЕ ПОЖАЛУЙСТА С НОМЕРОМ 1,2,3

Answer 1

1) Because they made easier a travel between two countries.

2) missing words - the, a
......

3) at-in, the longest, of, has taken - took, was being built - was building, while, a , and, to make a travel, then - when, whole