一、单项填空 在A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。（本大题共15分，每小题1分）
( ) 1. “I” the first letter in the word “industry”, there is also _____“u”and “s”in it.
A. am; an; a B. am; a; an C.is; an; a D.is; a; an
( ) 2. How selfish it is _____ him _____ the cakes with others.
A. for; to share B. of; not share C. for; not sharing D. of; not to share
