27.______a country’s food become rich, the diseases of poverty (malnutrition, infectious disease) ar
31. The National Recycling Coalition recently _____Congress to pass tax incentives that would encour
33. If the earth ______ warmer each year, so called greenhouse effect, the earth would become a dead
34. The increased carbon dioxide is probably not a threat to health, _____ it profoundly affects the
35. It has recently been proved_________ lasers can be used to perform bloodless, painless surgery.(
37. The report ____ the process of solving the mechanical problems is on the shelf. (A) explained (B
38. The person submitting the complaint must include a detailed description of ___________. (A) what
7.Friends might not be always trust-worthy, but dogs are; they have long been regarded as the most _