請依下文回答第 11 題至第 15 題：   The small European nation of Luxembourg just made a big investment in a flourishing realm of the spaceindustry: asteroid mining. Private companies and space agencies have been interested in mining asteroids forwater and   11   minerals like platinum, which can be used to fuel trips to destinations deeper in space.While no one has successfully mined an asteroid yet, the Luxembourg government plans to   12   thisindustry through research and development projects. Luxembourg is not the only country to look up to the skiesfor new places to mine. In 2015, US president Barack Obama signed a law that will let American companiesmine space resources. In January, the European Space Agency shared a vision for a research village on theMoon. This would be used as a   13   for mining companies. The US company Deep Space Industries saidspace resources will allow greater exploration of the solar system without the need to mind resources onEarth.   14   , there could be problems ahead for mining companies. The Outer Space Treaty of 1967 saysthat natural resources in space are part of mankind’s common   15   . This means private companies may notbe able to mine asteroids.
【題組】11
(A) organic
(B) marine
(C) rare
(D) gross