______ example of John shows that ______ knowledge of first aid can help a lot.
A.The; a | B.An; 不填 | C.An; a | D.The; 不填 |
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______ example of John shows that ______ knowledge of first aid can help a lot.
A.The; a | B.An; 不填 | C.An; a | D.The; 不填 |