25）This paper reflects the state of the art in……
    26）This paper explains the procedures for……
    27）This paper develops the theory of ……
    28）This article reviews the techniques used in……
    29）This paper investigates the techniques and procedures to……
    30）This article is about……
    31）This eassy is related to ……
    32）This paper concerns……
    33）This paper gives an account of ……
    34）This article tells of……
    35）This paper tries to describe……
    36）This paper provides an analysis of ……
    37）This paper reports the latest information on ……
    38）The author of this article reviews……
    39）The writer of this paper discusses……
    40）The writer of this eassy tries to explore……
    41）The aim of this paper is to determine……
    42）The purpose of this article is to review……