. ----You just think of yourself! You kept me waiting for at least three hours．

----I am sorry that you _____ think so.

A．would

B．might

C．could

D．should

( )检验是一次抽样检验的延伸，它要求对一批产品抽取至多两个样本即作出该批产品接收与否的结论，当从第一个样本不能判定该批产品接收与否时，再抽第二个样本然后由两个样本的结果来确定该批产品是否被接收。

A．一次抽样

B．二次抽样

C．多次抽样

D．序贯抽样