问题补充：
She tried , but failed; now she could do nothing but wait till her husband came.
A. to search the pockets her key
B. searching her keys for her pockets
C. searching the pockets for her keys
D. to search her keys for the pockets
答案：
A. to search the pockets her key
B. searching her keys for her pockets
(答案→)C. searching the pockets for her keys
D. to search her keys for the pockets
解析：本题考查动词用法。句中try doing试着做；search for寻找。句意：她试着到口袋里寻找她的钥匙，但没有。现在她除了等待直到她丈夫回来别无选择。
