In the 19th century, it ________ two or three months to cross North America by covered wagon. The trip ________ very rough and often dangerous. A. took / was B. had taken / had been C. too
In the 19th century, it ________ two or three months to cross North America by covered wagon. The trip ________ very rough and often dangerous.
A. took / was
B. had taken / had be
C. took / had been
D. had taken / was