Monodevelop Autocomplete

I’ve had this problem since I installed the newest version of Unity. When I opened MonoDevelop, it didn’t lack autocomplete at all, but it didn’t have the functions, the objects, etc. for Unity:
Example. GetComponent or Rigidbody (it lacked almost everything regarding objects in Unity). I’ve made a few reasearch and found out that other people had the same issue on the older versions, so this one shouldn’t be different. Though, I need help to get back the previous autocomplete!!!

Please, help me. Is it an annoying bug? Are there steps in order to set the autocomplete by myself?

If possible, I’m looking forward to a prompt reply!

try after adding folowing namespace at strating of the script.
using UnityEngine;
using System.Collections;