单项选择题 He asked John()he could swim.A. thatB. ifC. how

单项选择题 We consider it necessary()tom should improve his behavior.A. whichB. thatC. what

单项选择题 我国证券公司证券自营业务的投资范围中的“已经和依法可以在境内银行间市场交易的证券”包括( )。Ⅰ.国际开发机构人民币债券Ⅱ.金融债券Ⅲ.证券投资基金Ⅳ.央行票据A.Ⅰ、Ⅲ、ⅣB.Ⅰ、Ⅱ、ⅢC.Ⅰ、Ⅱ、ⅣD.Ⅱ、Ⅲ、Ⅳ