The recorder doesn’t work. Something seems ______ wrong with it.
#89787
A
to go
B
to have gone
C
going
D
having gone
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 _____ what would happen,none of them could find a way out. 
#90766
A
Left wondering
B
Having left wondering
C
Leaving to wonder
D
Having left to wonder
Each button, when ____, provides a piece of beautiful music.
#88692
A
clicked
B
having clicked
C
clicking
D
being clicked