题目内容：

I have class __________.
in .on.at.by.
选哪个

优质解答

这个问题是不是不完整?造几个句供您参考.I have class in the first classroom.（我在第一间教室有课）多用于描述地点.I have class on Sunday.（我周日有课)多用于描述日期.I have class at 9 o'clock.(我9点有课)...