1. The principal of this collection set is to use packaging design and simple arrangement ________(appeal) to different segments of consumers. 2. New energy-saving light bulbs is different because they provide the choices in colors and light levels you've come _______________ (expect). 3. Climate change could ____________________ (cancel) out in a staggeringly ambitious plan to plant the Sahara desert and Australian outback with trees. 4. The world's urban population is expected ___________________ (surpass) six billion by 2045. 5. The countries of the developing regions, particularly Africa will ___________________ (face) numerous challenges in meeting the needs of their growing urban populations, including for housing, infrastructure, transportation, energy and employment, as well as for basic services such as education and health care. 6. Our company hopes we can __________________ (meet) your desire with young and creative engineer team. 7. The impact of deforestation on the exchange of water vapor and carbon dioxide between the atmosphere and the terrestrial land surface ___________________ (be) the biggest concern with regard to the climate system. 8. When forest is degraded, it can _____ (set) off a devastating chain of events both locally and around the world. 9. Planting some types of trees such as: coffee, soy and palm oil can cause further soil erosion because their roots cannot ___________________ (hold) onto the soil. 10. Tree roots anchor the soil. Without trees, the soil is free to wash or ___________________ (blow) away, which can lead to vegetation growth problems.