耀斑爆发会干扰地球上的无线电短波通讯，往往在

A．子夜

B．白天

C．日出前

D．日落后

Last week, only two people came to look at the house,        wanted to buy it.       [ ]

A. none of them            

B. both of them      

C. none of whom            

D. neither of whom