In ____ accident _____ knowledge of first aid can make _____ real difference.
A.an; a; a | B.the; a; the | C.an; the; 不填 | D.a; a; 不填 |
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In ____ accident _____ knowledge of first aid can make _____ real difference.
A.an; a; a | B.the; a; the | C.an; the; 不填 | D.a; a; 不填 |