答案：
　　1. 据说上个月有600多名没有父母的小孩移民到英国。
　　2. “移民”是指为了找到更好的工作或居住条件而从一个地方搬迁到另一个地方的人。
　　3. 叙利亚的内战意味着有400多万人不得不离开家园。
　　4. Many of these people do not have any documents or passports.
　　5. Most of them are boys， with the youngest aged just 12.
　　1. big / small
　　This is a small box.This is a big box.
　　bigger / smaller | biggest / smallest
　　A B C
　　Box B is bigger than Box A.
　　Box B is smaller than Box C.
　　Box A is smaller than Box B and Box C.
　　Box A is the smallest box.
　　Box C is bigger than Box B and Box A.
　　Box C is the biggest box.
　　2. longer / shorter | longest / shortest
　　River Danube（多瑙河）
　　2，850 （km）
　　River Amazon（亚马孙河）
　　6，516 （km）
　　River Nile（尼罗河）
　　6，695 （km）
　　The River Amazon is longer than the River Danube.
　　The River Amazon is longer than the River Danube， but shorter than the River Nile.
　　The River Danube is the shortest river.
　　The River Nile is the longest river.
　　3. cheaper / more （less） expensive | cheapest / most （least） expensive
　　John’s car cost ￡15，000.
　　Jane’s car cost ￡25，000.
　　Bill’s car cost ￡55，000.
　　John’s car is less expensive than Jane’s car. It’s cheaper than Jane’s car.
　　Jane’s car is more expensive than John’s car， but less expensive than Bill’s car.
　　John’s car is the least expensive car. It’s the cheapest car.
　　Bill’s car is the most expensive car.