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1033.The conference aims to develop business and let people think about ______ they can have a positive influence on the planet.
A.why
B.that
C.what
D.how
1034.____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.
A.As;whom
B.What;whom
C.It;whose
D.As;whose
