OPPOSITE

Many ethnic groups find it hard to "maintain" their own languages.
1. continue
2. discontinue
3. preserve
4. speak
They talk about how developed countries have solved "the urbanisation" problems.
1. The period of time when a country develops a lot of industries on a wide scale.
2. The period of time when a country develops a lot of agriculture on a wide scale
3. A population shift from rural to urban areas.
4. A population shift from urban to rural areas.