have problems breathing中doing是什么

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• 非谓语动词/高三/英语 I smell something _ in the kitchen.Can I call you back in a minute?①I smell something _ in the kitchen.Can I call you back in a minute?A.burning B.burnt C.being burnt D.to be burnt②At the beginning of class,the noise of desks _ could be heard outside the classroom.A.opened and closed B.to be opened and closed C.being opened and closed D.to open and close第一题答案为A,我错选了C.第二题答案为C.易错选为A.以下是我的疑惑：这两题的非谓语动词中,doing/being done/done 三者的区别是什么?我印象中是这样的.
• 第一问：Then man【tried out】 several 【means】 to have those people get across what he said.请问这里的tried out和means分别是什么意思?=第二问：It's obvious that her refusing to see a doctor has ____(led in/resulted in) her illness woresening.请问led in没有导致,造成的意思吗?为什么答案是result in?=第三问：It's nice to see millions who had nothing but 【a record of】 misery and hungry _____（have/to have) the chance to improve their life and livig conditions.①请解释黑框中的a record of应该怎么理解.②请问为何横线处只能用have?我脑子
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• 1.what the doing?2.they are a race on the playground.3.race are they having?4.a race.5.does tom run than liu tao 6.no,he .7.he runs than the other boys 8.what's with him 9.he's he didn't have this morning?请问 中的?是填什么单词的?[这段话的意思是：汤姆没吃早饭,所以比其他的孩子跑得慢】
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