The teacher told him not to be late again,-------,he was still late .1but 2becase 3however 4so
问题描述：
The teacher told him not to be late again,-------,he was still late .1but 2becase 3however 4so
答
应该选however，因为有个逗号
如果没有逗号，应该选but
however用于句中时，前后应加逗号的；用于句首时，however后面加逗号； 用于句尾时，前面加逗号。
这是个固定语态用法
希望能帮上你一点
仅供参考，祝你学习进步！
答
选择but，这里是转折句，，老师告诉他不要再迟到，但是他仍然迟到了
答
根据,,可知应填however.
however用于句中时,前后应加逗号的；用于句首时,however后面加逗号； 用于句尾时,前面加逗号.
如：However,to the teacher's disappointment,he was late again.
To the teacher's disappointment,he was still late again,however.
仅供参考.