( )14.------- _______ you _______ the book ______ to the library yet.
------ Yes. I have.
A. Have ，returned，/ B. Have， returned， back
C. Did return ，/ D. Did， return，back
( )15.He has _______ finished his homework. He’s now ______ a rest.
A. yet, having B. just, has
C. ever, has D. already, having.
( )16. They don’t want to lose their ________ areas.
A. lives B. life C. living D. lively( )
( )17. She has never been to the country before, _________?
A. has she B. hasn’t she C. is she D. isn’t she
( )18. Please come to my party if you ____ free tomorrow.
A. will B. will be C. were D. are
( )19.She _______ an English teacher.