1. I promoted your sister but I didn't promote you. It's not because I love your sister more; it's because of your abilities.2. Most parents show favoritism to the youngest child.3. Teachers should not have favorite students.
 (noun) favoritism; favorite (verb) like or love somebody more; favor是正統的美語說法, 當然也可以很簡單的表示自己比較喜歡哪一個人.
1. 我升你妹妹卻沒有升你, 並非我偏心, 而是因為你能力的問題.2. 大部分的父母對最小的孩子偏心.3. 老師不該偏心.
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the grenhouse effect, which leads to melting of glaciers, which leads to rising sea levels.