Fill in the blanks in the following seyences with "yet"or"till".1 He learned English for three years at school.___he does not know much about it.2 Mathematics is not very popular;___one can learn a lot in the course.3 I did not start to learn science___became a middle school student.4 They worked hard on the problem ___at last the solved it.5 This class is an elective;___most of the boys like it very much.6 He read the story ___he learned it by heart.
Fill in the blanks in the following seyences with "yet"or"till".
1 He learned English for three years at school.___he does not know much about it.
2 Mathematics is not very popular;___one can learn a lot in the course.
3 I did not start to learn science___became a middle school student.
4 They worked hard on the problem ___at last the solved it.
5 This class is an elective;___most of the boys like it very much.
6 He read the story ___he learned it by heart.
理由。
1，2，4，5用yet
剩下的用till
1,2,5 yet
3,4,6 till
yet表示转折而till表示承上启下,有因果关系的意思1：yet 他学习英语三年了但是没学到多少东西2：yet 数学不是很流行但是人们可以从中学到很多3：till 我直到成为一个中学生才开始学自然科学4：till 他们在这个问题上...
1.Yet,
Yet he does not know much about it.
他仍然不太了解。
2.yet然而
3.till直到上中学才开始学科学
4.till直到解决才停止努力的工作
5.yet然而
6.till直到心领神会才停止读这个故事。