— Is Bob still performing?— I’m afraid not. He is said ________ the stage as he has become an official.    
#95439
A
to have left
B
to leave
C
to have been left
D
to be leaving
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Mary had to go to a meeting,so she left her children ___________ at home.
#91616
A
playing
B
played
C
to play
D
having played
Difficult _____ in practice, this new technique hasn’t been applied.
#91010
A
operated
B
to be operated
C
operating
D
to operate
I went back to the cinema to look for my keys, only __________. 
#97192
A
finding it shut
B
having found it gone
C
to find it closed
D
to have found them