我们的计划有三门商务英语课程。
东边有三门。北边有三门。南边有三门。西边有三门。
There were three gates on the east, three on the north, three on the south and three on the west.
每天早上,我有4门课要上,在下午我有三门课要上。
In the morning, I have four lessons, and in the afternoon I have three lessons.
There are three different ones on this Sunday, this Monday, this Tuesday.
我们有三门不同的课程,分别在这周天,周一和周二开讲。
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