diff --git a/app/controllers/avatar_controller.rb b/app/controllers/avatar_controller.rb
index 228f20599..e3625cfde 100644
--- a/app/controllers/avatar_controller.rb
+++ b/app/controllers/avatar_controller.rb
@@ -75,7 +75,8 @@ class AvatarController < ApplicationController
     end
     @temp_file = nil
 
-    while !File.exist?(diskfile)
+    while !File.exists?(diskfile)
+      logger.info("###############################################################sleep")
       sleep(0.5)
     end
 
diff --git a/app/views/student_work/edit.html.erb b/app/views/student_work/edit.html.erb
index 68c7a129b..4b34de454 100644
--- a/app/views/student_work/edit.html.erb
+++ b/app/views/student_work/edit.html.erb
@@ -16,7 +16,7 @@
         <%= @homework.name%>（作业名称）
       </div>
       <span class="fr c_grey">
-        截止时间：<%= @homework.end_time%>
+        截止时间：<%= format_time @homework.end_time%>
       </span>
       <div class="cl"></div>
       <a href="javascript:void(0);" class="c_blue">
diff --git a/app/views/student_work/new.html.erb b/app/views/student_work/new.html.erb
index e9f3a03de..6a8da2b94 100644
--- a/app/views/student_work/new.html.erb
+++ b/app/views/student_work/new.html.erb
@@ -222,7 +222,7 @@
         <%= @homework.name%>（作业名称）
       </div>
       <span class="fr c_grey">
-        截止时间：<%= @homework.end_time%>
+        截止时间：<%= format_time @homework.end_time%>
       </span>
       <div class="cl"></div>
       <a href="javascript:void(0);" class="c_blue">