Many of the animals in Rowling’s word are not real, and much of______happens is strange.

A． which

B． that

C． what

D． it

国有建设用地使用权人应当自“征缴土地闲置费决定书”送达之日起（）日内，按照规定缴纳土地闲置费

A、10

B、20

C、30

D、60