Lily’s mobile phone was left in a taxi accidentally, never ______ again.
#96886
A
to find
B
to be found
C
finding
D
being found
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 As the immune system weakens, it loses the ability ________ illnesses.
#88514
A
fighting
B
fought
C
to fight
D
to be fought
She pretended _______ me when I passed by. 
#98790
A
not to see
B
not seeing
C
to not see
D
having not seen
 I am too glad _____ you.
#98291
A
to see
B
seeing
C
saw
D
at seeing