the environmental organization gives up control over what activities guarantee carbon offset credit to Agriculture Department请问老师,what 从句怎么理解?what 在这是代词还是形容词? carbon offset credit 如何理解?在从句中那个是动词?guarantee 还是 offset?
At that time, a gallon of gasoline cost 18¢, which today would be close to $4——exactly where some experts think we might be headed.请问老师:此处的be headed 是be headed for吗?如果是为什么要省略for?where作什么成分?(等于for which吗?还是作名词?)
Your environment consists of the particular natural surroundings in which you live or exist, considered in relation to their physical characteristics or weather conditions.considered修饰哪个词?
They had just had enough time to swim out of danger when the boat again completed a circle. 这句话为什么是again completed,不应该是completed a circle again吗?again修饰动词不是放后面吗?