Up to now, large quantities of food ____ to Africa to save the starving people.

A．is sent

B．has been sent

C．have been sent

D．are sent

客户申请开展融资融券业务时，需要开立的账户包括（）。

Ⅰ.信用证券账户

Ⅱ.信用资金账户

Ⅲ.客户信用交易担保证券账户

Ⅳ.信用交易证券交收账户

A.Ⅰ，Ⅳ

B.Ⅰ，Ⅱ

C.Ⅰ，Ⅲ

D.Ⅱ，Ⅳ