Read the passage below and choose one correct answer for each question.

            From the 20^th to the 21^st century, there have been significant changes in the majority of countries around the world. Substantial differences are evident between the way we live today, and the way we lived a century ago. Viet Nam is no exception although there are some aspects of life in Viet Nam that are similar to the way of life of the twentieth century.

            Living in Viet Nam today differs greatly from the lifestyle of 100 years ago. People in the past mainly worked in agriculture whereas today there arc significantly fewer people working in this sector of the economy. These days. by comparison, people are more likely to be employed in manufacturing and tourism than in the rice fields. Moreover, Viet Nam, which was traditionally agricultural, is transforming into an entirely different country. While agriculture is still an important component of the Vietnamese economy, other enterprises are accounting for an increasing amount of economic activity.

            However, along with the differences, similarities also exist. The Vietnamese have kept many of the characteristics of their forefathers. The Vietnamese people are as friendly today as they were in the past. This is best illustrated in the way they welcome foreigners. Moreover, the determination of the people of Viet Nam has not changed. The Vietnamese work collectively and happily towards the development of their country.

            To conclude. while there are differences in past and present lifestyles. there are important similarities. Although Viet Nam has changed in many ways, there always have been, and always will be, the friendly welcoming smiles of the Vietnamese people.

Viet Nam has had significant changes ________.