diff --git a/lib/blink.js b/lib/blink.js
index c391a9f..407101d 100644
--- a/lib/blink.js
+++ b/lib/blink.js
@@ -2,6 +2,6 @@ var marked = require('marked')
 
 module.exports = function (str) {
   var md = marked(str)
-  // TODO
-  return null
+  var regex = /@@([\w\W]+?)@@/g;
+	return md.replace(regex, '<blink>$1</blink>');
 }
\ No newline at end of file
diff --git a/lib/capture.js b/lib/capture.js
index a08ee57..44319d4 100644
--- a/lib/capture.js
+++ b/lib/capture.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  var res=str.match(/\bx=(\d+)\b/)
+  return res&&res[1];
 }
\ No newline at end of file
diff --git a/lib/capture_breakword.js b/lib/capture_breakword.js
index a08ee57..dff14a8 100644
--- a/lib/capture_breakword.js
+++ b/lib/capture_breakword.js
@@ -1,3 +1,8 @@
 module.exports = function (str) {
   // TODO
+  if(str.match(/(\bx=)+(\d{1,}\b)/)){
+     return str.match(/(\bx=)+(\d{1,}\b)/)[2]
+  }else{
+    return null;
+  }
 }
\ No newline at end of file
diff --git a/lib/quantified_group.js b/lib/quantified_group.js
index a08ee57..61ef4f5 100644
--- a/lib/quantified_group.js
+++ b/lib/quantified_group.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return /^(0x[0-9a-fA-F]{2}\s+){8}$/.test(str);
 }
\ No newline at end of file
diff --git a/lib/quotes.js b/lib/quotes.js
index a08ee57..40e36d6 100644
--- a/lib/quotes.js
+++ b/lib/quotes.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  let arr=str.match(/\"([^\"]*)\"/g)
+  return arr;
 }
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..5156ed0
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,14 @@
+{
+  "name": "exercise7",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "marked": {
+      "version": "0.3.19",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-0.3.19.tgz",
+      "integrity": "sha512-ea2eGWOqNxPcXv8dyERdSr/6FmzvWwzjMxpfGB/sbMccXoct+xY+YukPD+QTUZwyvK7BZwcr4m21WBOW41pAkg==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
index bd82faa..1834aee 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "homepage": "https://github.com/FE-star/exercise7#readme",
   "devDependencies": {
-    "marked": "^0.3.6",
+    "marked": "^0.3.19",
     "mocha": "^3.5.0"
   }
 }