update /tool/ page

madawei2699 · madawei2699 · commit a33d4797294e · 2021-04-19T10:45:03.000+08:00
diff --git a/content/tool.zh-cn.md b/content/tool.zh-cn.md
@@ -35,3 +35,7 @@ outputs = "html"
 [whiteboard](https://wb.bmpi.dev)
 
 [handwriting](https://hw.bmpi.dev)
+
+## 英语学习
+
+[单词练习](https://word.bmpi.dev)
