If you don't know the word, you can look it up ________ the dictionary.

1. A.
   to
2. B.
   on
3. C.
   at
4. D.
   in

If you don’t know the word, you can _________ in the dictionary.

    A. look it after   B. look it up   C. look for it   　　D. look at it

If you don’t know the word, you can _________ in the dictionary.

    A. look it after      B. look it up        C. look for it   　　   D. look at it