It was so cold that they kept the fire ______ all night.
A. to burn B. burn
C. burning D. burned
Though I have often heard this song ______, I have never heard you ______ it.
A. being sung; sang B. sang; singing
C. sung; sing D. to be sung; to sing
（题文）Jefferson ______into the classroom while his teacher was writing on the blackboard.
A. looked B. slid
C. changed D. ran
As he works in a remote area,he visits his parents only ____.
A. occasionally B. anxiously
C. practically D. urgently
（题文）These books will be ______helpful to those who wish to improve their English.
A. precisely B. particularly
C. generally D. honestly
She has already tried her best.Please don’t be too _______about her job.
A. special B. responsible
C. unusual D. particular
