If you don’t know the new word, why don’t you________in the dictionary?

A. look at it　 　B. look after it

C. look up it 　 D. look it up

3. Why not look up the new word in a dictionary _____ you don’t know it ?

A. if   B. that   C. though    D. whether 

Why not look up the new word in a dictionary _____ you don’t know it ?

A. if   B. that   C. though    D. whether 

Why not look up the new word in a dictionary _____ you don’t know it ?

A. if   B. that   C. though    D. whether 

Why not look up the new word in a dictionary _____ you don’t know it ?

A. if   B. that   C. though    D. whether