1. The exhibition provided many companies with an opportunity to ______ (展示) their latest products to the consumers at home.
2. China’s launching its Tiangong-1 means that it has the ability to ______ (探索) space.
3. His house is ________ (方便的) for several schools.
4. All the countries are making an effort to find a practical _______ (解决方案)to the challenge they are facing.
