1. Can you put luggage in the back seat of a car in the United States?2. All child restraints should be installed in the rear seat of the car.3. My baby son always sits in the back of the car.
 the back seat of the car the rear seat of the car the back of the car有些人會說 back passenger seat，但事實上 passenger 不需要，也可說 I sit in the back of the car, seat 可省略。
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 glaciers, which leads to rising sa levels.