Studies show that MP3 people have made much use of _____ music may be causing hearing loss. 
#97396
A
enjoy
B
to enjoy
C
enjoying
D
enjoyed
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_____to reach them on the phone, we sent an email instead.
#92184
A
Fail
B
Failed
C
To fail
D
Having failed
Do you remember _____ Mr.Smith at the meeting last Saturday?
#98389
A
to meet
B
meet
C
meeting
D
being met
        writing the article, Mrs. Curie even forgot her dinner. 
#95902
A
Absorbed in
B
Absorbing at
C
Having absorbed by
D
To absorb in