the use they are ________ the waste helps to save a lot of money.A. made of B. made from C. making up of D. making of我知道选D.但是想分析一下这个句子的成分.解释选D的原因.谁能给我解释下,介词+关代,什么时候关代

英语翻译They are in the ___ ____. 适当形式填空,they are the ___(work)___(knife)! they are too expensive books!___ ____ the books are They are taking about the math problem together.同义句They are ___ ___ ___ about the math problem together. Are they helping the farmers ___ the work? The two school bags are the ___(twin).They are ___(Lucy and Lily) they are searching for the lost boy = they are ___ ____ _____ the lost boy 1.They aren't from China They are ___(foreign)2.They are beginning ___(pick) the apples They ___(每个） have a nice hat.What colors are the ()?They're ___(orange) ___ they ___ the Great Wall next week?Yes,they are.(plan) Where are his cousins?They ___(sleep) in the room they are ___ the insects carefully.填watch还是watching? Look at the ___(four)boys.They are my brothers. They are no ___(child) in the room. They are on a cycling t ___ of the park What shapes are the biscuits?They're ___ (星形). Where are ___(glass)?They're between the _____(lamp). There are ___colours in the logo of Beijing Olympic,they are___,___,___,___,___and___