—It'sraining!Whendiditstart?—Idon'tknowexactly．Infact，i...

来源：语文精选馆 2.36W

—It's raining! When did it start?

—I don't know exactly．In fact，it _________all this afternoon. (*市)

A1asts B has 1asted C．1asted D．will 1ast

B．解析：考查现在完成时态。从句意“事实上，已持续了整整一个下午了”，不难看出，不能用一般过去时，此句中last"持续”作延续*动词。从信息"all this afternoon"可知。