A:which the experts believed
B:that were believed
C:the experts believed that
D:the experts believed
某商店用2000元购进一批小学生书包,出售后发现供不应求,商店又购进第二批同样的书包,所购数量是第一批购进数量的3倍,但单价贵了2元,结果购买第二批书包用了6600元.
《水浒》中四大奸臣:____、____、____、____