完形填空。
There are many words in the English language. You will never   1    the meaning of every word in
English. When you read, you will often find many   2    you do not know.  You will not have enough
time to   3    reading and try to find every new word in a dictionary.
Sometimes you can_ 4    a new word because you know some of the parts of the new word. For
example, if a word finishes   5    the letters "er", that word   6    be the name of a   7    or thing that
does a certain action (某个动作).  A writer is a person who writes.    8   this is not   9    to
understand a word,  10   it will help you many times.

(     )1. A. know     (     )2. A. letters (     )3. A. stop     (     )4. A. study   (     )5. A. in       (     )6. A. should   (     )7. A. boy'     (     )8. A. Never   (     )9. A. helpful (     )10. A. but

B. see       B. stories   B. enjoy     B. guess     B. off       B. must       B. girl       B. Sometimes B. useful     B. and

C. look       C. words     C. keep       C. find       C. with       C. can't     C. person     C. Yet       C. enough     C. so

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