I didn't go to concerts last night ；_ _ _I had to do my homework空_英语解答

I didn't go to concerts last night ；_ _ _I had to do my homework
空里面为什么不能填which was because ,which 不是先行词代前面那个句子吗?

人气：162 ℃　时间：2020-04-27 09:48:52

解答

因为前面的符号是分号,说明是并列句,不是定语从句,
如果前面的分号改成逗号,就可以说which was because了.
注意题干中的符号,高考经常会再次设置陷阱.