Description STEEL SHEET FOR GALVANIZING WITH EXCELLENT WORKABILITY, AND METHOD FOR MANUFACTURING THE SAME Technical Field [1] The present invention generally relates to a high strength ductile steel sheet for extra deep drawing for interior or exterior plates of automobile bodies and the like, and to a method for manufacturing the same. More particularly, the present invention relates to a steel sheet forgalvanizing with excellent workability, which has a tensile strength of 28 ~ 50 QM/ancFhas excellent properties in terms of formability, secondary work embrittlement resistance, fatigue properties of welded joints and surface quality, and to a method for manufacturing the same. Background Art [2] In recent years, as components of automobile body have had a tendency of becoming more complicated in shapes and integrated as a single component, steel sheets for the automobile body have been required to have further enhanced formability. In addition, the steel sheets for the automobile body also have been required to have excellent secondary work embrittlement and fatigue properties of welded joints in terms of using conditions of the automobiles, and to have an appealing plated surface. [3] Generally, steel sheets having enhanced formability and strength are produced in such a way of adding Si, Mn, Ti, Al and the like to highly pure steel which is minimized in contents of impurities in the steel. [4] After cold rolling a hot rolled steel sheet, annealing is performed at a temperature of 700 °C or more for recrystallization of work hardened structures. However, since most of the added elements described as above have a higher affinity to oxygen than Fe, the added elements are grown to surface agglomerates, such as MnO, SiO Al O , TiO and the like, in singular or composite forms during the cold annealing process. [5] As an amount of the surface agglomerates increases, wettability of plating bath is deteriorated, and an alloying reaction in hot plating is further interfered, thereby causing surface defects such as non-plated regions and the h'ke. [6] In addition, coarsening of the surface agglomerates causes fine dents on the surface of the plated steel sheet via attachment of the coarsened surface agglomerates to a hearth roll of a continuous furnace, thereby providing a significantly adverse influence on surface quality of the steel sheet. [7] In order to solve problems regarding plating defects described as above, JP2002- 146477, JP200 1-64750 and JP2002-155317 disclose techniques aiming to enhance plating properties by adding specific elements such as Cr, Sb and the like to a steel sheet, and JP200 1-288550 discloses a technique aiming to suppress formation of the surface agglomerates during cold annealing through pre-oxidation of hot coil before cold rolling. [8] However, since these techniques do not ensure the effect through addition of the specific elements and cannot be realized by currently available equipment for hot rolling, cold rolling and continuous annealing, these techniques are not commercially applied in practice. Disclosure of Invention Technical Problem [9] Therefore, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a steel sheet for galvanizing with Kyf/wnl excellent workability, which has a tensile strength of 28 ~ 50.Qf/B, and has excellent properties in terms of formability, secondary work embrittlement resistance, fatigue properties of welded joints and surface quality. [10] It is another object of the present invention to provide a method for manufacturing the steel sheet for galvanizing with excellent workability. Technical Solution [11] In accordance with one aspect of the invention, the above and other objects can be accomplished by the provision of a steel sheet for galvanizing with excellent workability, comprising, by weight%: C: 0.010% or less, Si: 0.1% or less, Mn: 0.06 ~ 1.5%, P: 0.15% or less, S: 0.020% or less, Sol. Al: 0.10 ~ 0.40%, N: 0.010% or less, Ti: 0.003 ~ 0.010%, Nb: 0.003 ~ 0.040%, B: 0.0002 ~ 0.0020%, Mo: 0.05% or less, one or both of Sb: 0.005 ~ 0.05% and Sn: 0.005 - 0.05%, a total amount of Sb and Sn being in the range of 0.005 -0.1% when both of Sb and Sn are added to the steel sheet, and the balance of Fe and other unavoidable impurities, wherein the steel sheet has At*-surface agglomerates having an average diameter of 1/0 or less, and a tensile strength of [12] Preferably, the average diameter of the surface agglomerates is suppressed in growth by 10% or less for an increase in annealing temperature of 10 °C. [13] In accordance with another aspect of the invention, a method for manufacturing a steel sheet for galvanizing with excellent workability comprises: reheating a steel slab comprising by weight%: C: 0.010% or less, Si: 0.1% or less, Mn: 0.06 - 1.5%, P: 0.15% or less, S: 0.020% or less, Sol. Al: 0.10 ~ 0.40%, N: 0.010% or less, Ti: 0.003 ~ 0.010%, Nb: 0.003 ~ 0.040%, B: 0.0002 - 0.0020%, Mo: 0.05% or less, one or both of Sb: 0.005 - 0.05% and Sn: 0.005 ~ 0.05%, a total amount of Sb and Sn being in the range of 0.005 ~ 0.1 % when both of Sb and Sn are added to the steel sheet, and the balance of Fe and other unavoidable impurities; hot rolling the reheated steel slab with finish rolling at a finish rolling temperature of a single phase austenite region to form a steel sheet, followed by coiling the hot rolled steel sheet; cold rolling the hot rolled steel sheet; and continuously annealing the cold rolled steel sheet at a temperature of 700 °C or more. Advantageous Effects [14] As apparent from the above description, the present invention provides a steel sheet !• - P/ J1 for galvanizing with excellent workability, which has a tensile strength of 28 ~ 50.QfVB,