diff --git a/lib/blink.js b/lib/blink.js
index c391a9f..0d3e91e 100644
--- a/lib/blink.js
+++ b/lib/blink.js
@@ -1,7 +1,17 @@
-var marked = require('marked')
+var MARK_MAP = {
+  '@@': 'blink',
+  '__': 'strong',
+  '\\*\\*': 'strong',
+  '\\*': 'em'
+}
 
 module.exports = function (str) {
-  var md = marked(str)
-  // TODO
-  return null
+  let aaaa = `<p>${str}</p>`
+  for (let key in MARK_MAP) {
+    aaaa = aaaa.replace(new RegExp(`${key}(.+?)${key}`, 'g'), function (match, p1) {
+      return `<${MARK_MAP[key]}>${p1}</${MARK_MAP[key]}>`
+    })
+  }
+
+  return aaaa
 }
\ No newline at end of file
diff --git a/lib/capture.js b/lib/capture.js
index a08ee57..d0d4336 100644
--- a/lib/capture.js
+++ b/lib/capture.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
-  // TODO
+  let res = /x=(\d+)/.exec(str)
+  return res ? res[1] : null
 }
\ No newline at end of file
diff --git a/lib/capture_breakword.js b/lib/capture_breakword.js
index a08ee57..2443c5e 100644
--- a/lib/capture_breakword.js
+++ b/lib/capture_breakword.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
-  // TODO
+  let res = /\bx=(\d+)\b/.exec(str)
+  return res ? res[1] : null
 }
\ No newline at end of file
diff --git a/lib/quantified_group.js b/lib/quantified_group.js
index a08ee57..a64c852 100644
--- a/lib/quantified_group.js
+++ b/lib/quantified_group.js
@@ -1,3 +1,3 @@
 module.exports = function (str) {
-  // TODO
+  return (str.match(/0x[0-9a-f]{2}/ig) || []).length === 8
 }
\ No newline at end of file
diff --git a/lib/quotes.js b/lib/quotes.js
index a08ee57..e724604 100644
--- a/lib/quotes.js
+++ b/lib/quotes.js
@@ -1,3 +1,3 @@
 module.exports = function (str) {
-  // TODO
+  return str.match(/"[^"]*"/g)
 }
\ No newline at end of file