新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成全文内容At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Fore

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新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成全文内容At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Fore

新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成全文内容At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Fore
新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成
全文内容
At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Forest fires are often caused by broken glass or by cigarette ends which people carelessly throw away.Yesterday the firemen examined the ground carefully,but were not able to find any broken glass.They were also quite sure that a cigarette end did not start the fire.This morning,however,a firemen accidentally discovered the cause.He noticed the remains of a snake which was wound round the electric wires of a 16,000-volt power line.In this way,he was able to solve the mystery.The explanation was simple but very unusual.A bird had snatched up the snake from the ground and then dropped it on to the wires.The snake then wound itself round the wires.When it did so,it sent sparks down to the ground and these immediately started a fire.

新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成全文内容At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Fore
A bird had snatched up the snake 发生在 He noticed the remains 前,符合过去的过去,故用过去完成.

很简单，因为故事叙述的大背景是过去式，尤其是第一句话

所以，原本的现在完成时就要改成过去完成时

新概念英语第53课Hot Snake.A bird had snatched up the snake from the ground.为什么要用过去完成全文内容At last firemen have put out a big forest fire in California.Since then,they have been trying to find out how the fire began.Fore broken glass 引起火灾?新概念英语第二册53课hot snake中提到火灾由broken glass（碎玻璃）引起? The snake been on the ground 这句话正确吗?这原来是新概念英语书上第53课“多项选择题”中的一道英语选择题,原题是:The bird snatched the snake from the ground.So the snake been _______ the ground.A.at B.from C.over D. 新概念英语第一册53课课文 新概念英语2册53课问题.有俩句话：1.the snake then wound itself round the wires2.He noticed the remains of a snake which was wound round the electric wries of a 16000-volt power line.我有俩个问题：1.这俩句话中都有wound round 新概念英语2册53课问题有俩句话：1.the snake then wound itself round the wires2.He noticed the remains of a snake which was wound round the electric wries of a 16000-volt power line.我有俩个问题：1.这俩句话中都有wound round, 关于新概念英语第四册新概念第四册第20课snake poison的最后一句the effects on these of viperine poison is almost immediate.为什么谓语用is而不用are? 新概念英语青少版2A 第13课 卡兰津人课文 新概念英语第一册116课 A部分 新概念英语第一册第39课 新概念英语第二册第53课练习题, the remains of 的意思 这句话总是觉得很别扭呐...新概念2 的 第53课中 He noticed the remains of~a snake which was wound round the electric wires of a 16,000-volt power line.并且 其中的 “wound round”该怎么翻译好 也感 新概念英语新概念英第一册47课怎么讲 新概念英语第二册第5课选择题第8题答案是A还是B? snake英语中snake是什么意思 新概念英语第73课课文 新概念英语第71课课文 新概念英语第一册121课课文