为了搞清井内的严重出砂需进行工程测井和从井底（）并分析其成份。
A、油样
B、水样
C、井底取样
D、捞取砂样
参考答案：D
I searched for my wallet and it wasn't there. At first, I thought I _______ it at home. Then I remembered _______ it out to pay for the taxi.
A．must have left；to take
B．may leave；taking
C．might leave； to take
D．could have left；taking
自助设备吞卡后，银行怎样处理被吞卡？
