There is no doubt，in my opinion， ________matters is not the speed，but the quality of the product.
#67758
A
that
B
which
C
what that
D
that what
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Throughout the world__________advance has been made in science and technology is due to education which brings forth knowledge, creation and inventions.
#73495
A
whoever
B
whatever
C
what
D
that
He is of confidence, , in my opinion, is most important in society.
#67316
A
how
B
that
C
what
D
which
Elbert Einstein, for ______ life had once been very hard, was successful later in science .
#73276
A
whom
B
whose
C
which
D
his