Mark the letter A, B, C, or D to indicate the correct answer.

It's important to preserve the cultural _________ of a nation.
1. marriage
2. trend
3. identity
4. origin
The waste stored in _________ can contaminate the soil and water.
1. vehicles
2. landfills
3. pollution
4. layer
Some waste materials release methane as they _________.
1. pollute
2. are reused
3. are thrown away
4. decompose
My grandfather had an unhappy _________ during the war.
1. account
2. death
3. childhood
4. festivity
Uncle Ho _________ his whole life to fighting for the independence and freedom of Viet Nam.
1. attended
2. devoted
3. adopted
4. protected
From a local _________, K-pop has spread around the world.
1. trend
2. style
3. custom
4. shock
Tourists are usually not familiar with the _________ of ethnic minorities in Viet Nam.
1. beliefs
2. fairs
3. customs
4. origin
My father had played football in his _________ before he took up tennis.
1. childcare
2. youth
3. marriage
4. achievement