24_________24. A discovered B found C planned D designed

3，8，15，______，35 （） A．24 B．22 C．20 D．18

18，24，21，27，24，30，______ A.19 B.22 C.25 D.27

2，4，7，21，______，96 A.24 B.27 C.54 D.81

7，13，24，45，______ A.56 B.61 C.71 D.81

He planned to steal the money, but his ______ were discovered.A．arrangementsB．blueprintsC．

Coins, unlike other ancient artifacts, are usually found by accident______ by design.A．not