摘要：This experiment turned out to be failure, but, as we know, success often comes after failure. A.a;a B. a;/ C. /,/ D./,a
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16. This experiment turned out to be____failure, but, as we know, success often comes after___failure.
A. a; \ B. a; a C. \; \ D. \; a
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16. This experiment turned out to be____failure, but, as we know, success often comes after___failure.
| A．a; \ | B．a; a | C．\; \ | D．\; a |