—Look! There _______.

 —Oh, yes, there _______.

A. go the fishermen; go they                

B. go the fishermen; they go

C. are the fishermen going; are going        

D. went the fishermen; they went

已知袋中有8个球，其中5个白球，3个红球．从中任取一个球，不放回地取两次，设事件A={第一次取到白球），B={第二次取到白球）．求P（AB）．