If you don't know a word, you must ________the word in a dictionary.

A. look up

B. look down

C. look over

D. look out

根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。（每空一词）

There a__85__ many words in English, but you can’t know every English word. W__86__ you read, you’ll often find many new w__87__ you don’t know. You’ll not have enough t_88_ to stop reading and try to find every new word in a dictionary（词典）. Sometimes you can g__89__ the meaning of a new word because you know some of the parts of the new word.

For example. if a word ends in the l__90__ “er”, that word must be the name for a p__91__

or a thing that does some action(动作). A w__92__ is a person who writes. Sometimes this is

not enough to u__93__ a word, but it will h__94__ you to know the article(文章) easily when you are reading.