—Why did you leave without a word of warning to John?

—But what _____ otherwise? He never listens to me.

A．could I have done

B．would I do

C．must I have done

D．should I do

下列选项中，不属于世界银行贷款项目主要采购方式的是( )。

A．国际竞争性招标

B．中间金融机构贷款的采购

C．有限国际招标

D．询价采购