We will have modern equipment ______ things that are complicated. This will make things simple.      
#96765
A
to assist us with
B
assist us to
C
to assist us in
D
assisting us with .
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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