[نبيل موريس جورج]

شاكر للجميع علي الحوار
واسمح لي مستر ابراهيم بالمشاركة ..........

A is usually dropped before part of if there is no adjective
.
Part of the roof was missing. (B ut A large part of the roof was missing.) Part of the trouble is that I can't see very well.
(More natural than A part of the trouble ... )

المصدر : Practical English Usage