[解析]
I used to love science class﹣all of them﹣biology,chemistry,geography,and physics.I think I liked those classes because I felt that it helped me understand what the world works.For example,when I was a child,the rain was a mystery.In one class,I learned∧it rained.I think science classes clear up mysteries.But then there was always more mysteries∧look into.What was my least favorite class?That was maths.After learn the basics of the subject,nothing else seemed very practically to me.I never saw how I can use it in my daily life.
解析:
1.class→classes.考查名词的数.根据all of them可以确定class要用复数形式.
2.it→they.考查代词的用法.they指代classes.
3.what→how.考查从句的连接词的用法.what在宾语从句中作宾语,而这个句子中的谓语动词works是一个不及物动词,后面不接宾语.
4.去掉rain前的定冠词the.考查冠词的基本用法.rain在这里是泛指.
5.在learned和it rained之间加why.考查从句的连接词的用法.这句话的意思是"我知道了为什么下雨".
6.was→are.考查主谓一致.这是一个存在句,是事实,由主语mysteries可知用系动词are.
7.在mysteries和look into中间加to.考查动词不定式的用法.to look into作mysteries的定语,表示"将要去调查的秘密".
8.learn→learning..考查非谓语动词.在介词After后要用动名词作宾语.
9.practically→practical.考查形容词的用法.seemed是系动词,后接形容词作表语.
10.can→could.考查时态.根据主句I never saw是一般过去时态可知从句 how I can use it in my daily life也用一般过去时态,所以用could.