1.The Yellow River is

1.The Yellow River is

1The Yellow River is second to the longest river in China.(second to :仅次于）2Susan is a woman at the age of seventy.3 He has gone to New York for study for ten years.4 It took me at least two hours doing my homework yesterday evening.6 She had to ask for a leave for three days because of her illness 7 A new library with 50 thousand books is to be opened .（be to do:打算……）8 My sister has been a teacher for 6 years.9Two fifths of the students in our school are from the country.( Two fifths ：五分之二,即40%）10Tomorrow we are going to learn the sixth lesson.======以下答案可供参考======供参考答案1:1.The Yellow River is __the second longest_________river in China,[The second longest river in China is The Yellow River.]2,Susan is a __seventy-year-old___woman.[The woman known as Susan is seventy-year-old. (seventy years of age) ]3.It is ten years since he went to New York for study.[He went to New Yoek for his study ten years ago.]4.I ___spent___at least two hours doing my homework yesterday evening.[My homework took me two hours to complete yesterday evening.]6.She had to ask for _a three day leave___because of her illness [Her illness caused her to take a three-day leave.]7.A new library with 50 thousand books will be opened.[A new library which stores 50 thousand books is to be opened (soon).]8.My sister became a teacher 6 years ago[My sister has been teaching for the past 6 years.]9.__40 percent__of the students in our school are from the country.[Country students make up 40 per cent. of our school's population.]10.Tomorrow we are going to learn _Lesson Six[Lesson Six is what we are going to learn/cover tomorrow.]供参考答案2:1.黄河是中国第二长河。2.苏珊是一位70岁高龄的妇女。3.他去纽约求学已经七年了。4.昨天晚上我至少用了两个小时来写作业。6.因为生病她不得不请三天的假。7.一个拥有五万本图书的新图书馆就要开张放了。8.六年前我姐姐成为一名教师。9.我们学校有百分之四十的学生来自农村。10.明天我们讲学习第六课。

这个解释是对的