Despite other scientists' __________ of interest, Fleming kept trying to develop the chemical __________ it would be safe and effective.
A.lack; so as to |
B.lacking; so as to |
C.lack; so that |
D.to lack; so that |
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Despite other scientists' __________ of interest, Fleming kept trying to develop the chemical __________ it would be safe and effective.
A.lack; so as to |
B.lacking; so as to |
C.lack; so that |
D.to lack; so that |