We don’t have much homework now and our school-bags are _____ they used to be.   [ ]

A. as heavy as

B. as heavily as

C. not as heavily as  

D. not so heavy as

售卡（充值）网点代表主管公司向客户办理（）等业务。

A.加油卡开户

B.售卡充值

C.资金汇划

D.销户退款