SARS is an illness that can result in death unless left ______in time.
#98986
A
to treat
B
treating
C
treated
D
treat
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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 .
--- The light in the office is still on.    --- Oh, I forgot _______. 
#98793
A
turning it off
B
turn it off
C
to turn it off
D
having turned it off