能证明地球自转的现象是[ ] A．太阳的东升西落 B．站得高，看得远 C．人的影
题型：选择题
问题：
能证明地球自转的现象是[ ]
A．太阳的东升西落
B．站得高，看得远
C．人的影子在不同季节长度不一样
D．昼夜长短的变化
题型：选择题
短文改错
Recently, my classmates have had a hea
ted discussion about if we should have optional courses
(选修课) in high schools. Some students were in favor of optional courses. They say interest is best
teacher and our spare time will be colorful and meaningful. Students can not only enlarge their
knowledges but also improve their abilities. However, others are against the idea, said that optional
courses will take up too much time as well as energy. Besides, some optional courses have something
to do with the College Entrance Examination. They are afraid they'll fall behind their classmates if they
will take optional courses. I'd like to take one or two of the optional courses, which, I think, will certain
benefit me lot.
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