not until ______ himsElF sEriously ill.
A．hE hAD ComplEtED thE tAsk DiD hE FinD
B．hAD hE ComplEtED thE tAsk DiD hE FinD
C．hE ComplEtED thE tAsk hAD hE FounD
D．DiD hE ComplEtE thE tAsk hE hAD FounD