1. Jehovah's Witnesses often go door to door to preach to strangers the Christian faith.2. My Christian group does field service every Wednesday evening in this neighborhood.3. I gave my neighbors a good witness about Bible truths. We talked for hours.
 preach field service witnesspreach 是非常籠統的字，指傳導任何看法或信念，用在傳道非常貼切
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 effct, which leads to melting of glaciers, which leads to rising sea levels.