The old man,_______ abroad for 20 years, is on the way back to his mother land.
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A
to work
B
working
C
having worked
D
to have worked
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The boy insisted ______ in a nearby school. 
#92065
A
to be taught
B
being taught
C
on being taught
D
on teaching
we were ______ at the news of her sudden death.              
#95901
A
astonishing
B
to astonish
C
astonished
D
astonish