When I went in,he was lying on the floor ___ at the ceiling.

When I went in,he was lying on the floor ___ at the ceiling.
        A.to stare   B.stared    C.was staring    D.staring 
   2.I want to make ___ clear that we should do an important and necessary job.
        A.that         B.this         C.it                   D.what
   3.That's ___ I was born and grew up.
        A.there         B.where   C.in which        D.the place
   4.Some college students are seen doing ___ work they can find to support themselves.
        A.that         B.which      C.no matter what     D.whatever
   5.The reporter asked the gentleman why he ___ in such a simple way.
        A.was dressed    B.wore    C.put on     D.had on