When the police asked the suspects for information they seemed reluctant to say anything.
 look reluctant (to do something) look as if he is in a dilemma形容看起來為難的樣子. 指不情願的意思.
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 effect, which leads to melting of glacers, which leads to rising sea levels.