我的第二个问题是什么？

What is my ___second question?

其次，他们未能发送书面警告。

___Second, they failed to send a written warning.

其次，我认为在葡萄园里采摘和吃葡萄是个好主意。

___Second, I think it's a good idea to enjoy picking and eating grapes in a vineyard.