Jack went to college last year and left his parents ,____________ to return home until he achieves his goal.
#95853
A
determining not
B
not determined
C
not determining
D
determined not
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Though ________ experience, he soon got a higher pay by working hard.
#96643
A
lacked
B
lacking of
C
lacking
D
lacked in
. _______ different kinds of pianos, the workers farther improved their quality.
#97438
A
To produce 
B
Being produced 
C
Produced
D
Having produced
 With his attention _________ on his book, he didn’t notice someone entering his room.
#90427
A
concentrating
B
concentrated
C
to concentrate
D
concentrates