diff --git a/stage01-basics/02-constants/main.go b/stage01-basics/02-constants/main.go
index 827fa48..1089bba 100644
--- a/stage01-basics/02-constants/main.go
+++ b/stage01-basics/02-constants/main.go
@@ -9,9 +9,9 @@ func exercise1() {
 	// GREETING: string，值为"你好，世界！"
 	// MAX_COUNT: int，值为1000
 	// SUCCESS: bool，值为true
-	const GREETING string = ____
-	const MAX_COUNT int = ____
-	const SUCCESS bool = ____
+	const GREETING string = "你好，世界！"
+	const MAX_COUNT int = 1000
+	const SUCCESS bool = true
 
 	fmt.Printf("问候语: %s\n最大数量: %d\n成功状态: %t\n", GREETING, MAX_COUNT, SUCCESS)
 }
@@ -24,9 +24,9 @@ func exercise2() {
 	// HTTP_NOT_FOUND: int，值为404
 	// HTTP_SERVER_ERROR: int，值为500
 	const (
-		HTTP_OK           = ____
-		HTTP_NOT_FOUND    = ____
-		HTTP_SERVER_ERROR = ____
+		HTTP_OK           = 200
+		HTTP_NOT_FOUND    = 404
+		HTTP_SERVER_ERROR = 500
 	)
 
 	fmt.Printf("HTTP状态码: OK=%d, NOT_FOUND=%d, SERVER_ERROR=%d\n",
@@ -63,7 +63,7 @@ func exercise4() {
 	// LEVEL_4: 103
 	// 提示：第一个常量使用 ioda + 100
 	const (
-		LEVEL_1 = iota + ____
+		LEVEL_1 = iota + 100
 		LEVEL_2
 		LEVEL_3
 		LEVEL_4
@@ -82,9 +82,9 @@ func exercise5() {
 	// GB: 1073741824 (1 << 30)
 	const (
 		_  = iota
-		KB = 1 << ____
-		MB = 1 << ____
-		GB = 1 << ____
+		KB = 1 << (iota * 10)
+		MB
+		GB
 	)
 
 	fmt.Printf("存储单位: KB=%d, MB=%d, GB=%d\n", KB, MB, GB)