Here is a story.
A participant in the long-distance race got his shoes filled with sand when he was crossing a beach.
He had to stop to get the sand out hastily before he resumed running.
Unfortunately a grain of sand remained rubbing the sole and became increasingly telling
so that each step meant a twinge of pain.
Reluctant to halt and get rid of the sand，
he continued to run in spite of the pain until he could stand no more.
He dropped out of the contest just a few yards from the finishing line.
As he managed to get out of the shoe painfully，
he was surprised to find the cause of his lasting torment was only a grain of sand.
It seems that the greatest obstacle on ones way forward may not be a high mountain or a deep valley
but a grain of sand that is hardly visible.
To avoid blame on a minor fault one may tell a lie.
That adds a burden to a heavy heart and weighs it down.
In the days to come he will have to fabricate one falsehood after another
to cover the lie he told and the fault he committed.
Thus he will never be able to free himself from lingering anxiety, worry and regret,
to the ignorance that all his sufferings originate in only a grain of sand
the first lie he told.
2017届高考英语一轮单元复习精讲课件：第1部分 选修7 Unit3《Under the sea》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修2 Unit5《Music》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修3 Unit5《Canada－“The True North”》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：选修6-Unit 2《Poems》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 必修3 Unit1《Festivals around the world》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 选修8 Unit2《Cloning》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修3 Unit4《Astronomy the science of the stars》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修5 Unit5《First aid》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修4 Unit1《Women of achievement》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修5 Unit4《Making the news》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修4-Unit 1《Women of achievement》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 选修6 Unit2《Poems》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 选修8 Unit1《Aland of diversity》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修5-Unit 2《The United Kingdom》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 选修7 Unit1《Living well》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修4 Unit4《Women of achievement》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修5-Unit 1《Great scientists》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 选修6 Unit4《Global warming》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修3-Unit 1《Festivals around the world》（人教版新课标含解析）
2017届高考英语一轮复习分层限时跟踪练：必修3-Unit 3《The Million Pound Bank Note》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 选修8 Unit3《Inventors and inventions》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 选修7 Unit2《Robots》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 选修6 Unit5《The power of nature》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 选修7 Unit5《Travelling abroad》（人教版新课标）
2017届高考英语一轮单元复习精讲课件：第1部分 必修3 Unit3《The Million Pound Bank Note》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修5-Unit 5《First aid》（人教版新课标含解析）
2017届高考英语一轮单元复习精讲课件：第1部分 必修5 Unit3《Life in the future》（人教版新课标）
2017届高考英语一轮复习分层限时跟踪练：必修4-Unit 4《Women of achievement》（人教版新课标含解析）
2017届高考英语一轮复习分层限时跟踪练：必修5-Unit 4《Making the news》（人教版新课标含解析）
2017届高考英语一轮复习分层限时跟踪练：必修3-Unit 4《Astronomy the science of the stars》（人教版新课标含解析）