diff --git a/en/src/basic-types/char-bool-unit.md b/en/src/basic-types/char-bool-unit.md
index b66b585..87e0223 100644
--- a/en/src/basic-types/char-bool-unit.md
+++ b/en/src/basic-types/char-bool-unit.md
@@ -4,7 +4,7 @@
 1. 🌟
 ```rust, editable
 
-// make it work
+// Make it work
 use std::mem::size_of_val;
 fn main() {
     let c1 = 'a';
@@ -13,14 +13,14 @@ fn main() {
     let c2 = '中';
     assert_eq!(size_of_val(&c2),3); 
 
-    println!("Success!")
+    println!("Success!");
 } 
 ```
 
 2. 🌟
 ```rust, editable
 
-// make it work
+// Make it work
 fn main() {
     let c1 = "中";
     print_char(c1);
@@ -35,13 +35,13 @@ fn print_char(c : char) {
 3. 🌟
 ```rust, editable
 
-// make println! work
+// Make println! work
 fn main() {
     let _f: bool = false;
 
     let t = true;
     if !t {
-        println!("Success!")
+        println!("Success!");
     }
 } 
 ```
@@ -49,13 +49,13 @@ fn main() {
 4. 🌟
 ```rust, editable
 
-// make it work
+// Make it work
 fn main() {
     let f = true;
     let t = true && false;
     assert_eq!(t, f);
 
-    println!("Success!")
+    println!("Success!");
 }
 ```
 
@@ -64,36 +64,36 @@ fn main() {
 5. 🌟🌟
 ```rust,editable
 
-// make it work, don't modify `implicitly_ret_unit` !
+// Make it work, don't modify `implicitly_ret_unit` !
 fn main() {
     let _v: () = ();
 
     let v = (2, 3);
     assert_eq!(v, implicitly_ret_unit());
 
-    println!("Success!")
+    println!("Success!");
 }
 
 fn implicitly_ret_unit() {
-    println!("I will return a ()")
+    println!("I will return a ()");
 }
 
-// don't use this one
+// Don't use this one
 fn explicitly_ret_unit() -> () {
-    println!("I will return a ()")
+    println!("I will return a ()");
 }
 ```
 
-6. 🌟🌟 what's the size of the unit type?
+6. 🌟🌟 What's the size of the unit type?
 ```rust,editable
 
-// modify `4` in assert to make it work
+// Modify `4` in assert to make it work
 use std::mem::size_of_val;
 fn main() {
     let unit: () = ();
     assert!(size_of_val(&unit) == 4);
 
-    println!("Success!")
+    println!("Success!");
 }
 ```