Question

Complete the following sentences by filling in the correct form of the verb.
In the last hundred years, travelling (a)
(become) much easier
and very comfortable. In the 19th century, it (b)
(take) two or
three days to cross North America by a covered wagon. The trip (c)
(be) very rough and often dangerous. Things (d)
(change) a great​

Answer 1

Answer:

a. had became

b. took

c. had been

d.changed