1. Wow he made three jump shots in one minute. He's on fire!2. You are on a roll here!3. A: No more goofing around. Let's play seriously.
 on fire on a rollon fire 跟 on a roll 都有發威的意思。
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 greenhouse efect, which leads to melting of glaciers, which leads to rising sea levels.