Edward, you play so well. But I ________ you played the piano.
#104527
A
didn’t know
B
hadn’t known
C
don’t know
D
haven’t known
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We should spend the money on something that will ________ everyone.
#100879
A
benefit to
B
benefit from
C
benefit
D
beneficial
Tom       in the library every night over the last three months.
#102657
A
works
B
worked
C
have been working
D
had been working