1. Progress in materials research is ---- to overcoming such problems as the finiteness of the world’s resources and possible shortages of strategic materials.

2. Asthma is a common ---- in which the airways lining the lung become inflamed.

3. From the report released today, it appears that oil tankers suffer their major ---- on their return journeys.

4. People curious to get some idea of what it is like to be black in a country ---- by whites need look no further than Dennis Williams’s new novel Crossover.

5. It is plain that the United Nations will not lift the sanctions unless the Iraqi government fully ---- with the Security
Council resolutions.