题目

购买股票已成为人们投资理财的重要方式。五年前，小张在股市低迷时购买了某上市公司的股票，一直持有到今年才卖出。该股票为他带来了3万元的收益。这一收益的来源是 ①上市公司的利润                        ②商业银行的利息 ③证券公司的利润                        ④股票的买卖差价 A．①②             B．①③             C．②③             D．①④ You _______ things about. Look, what a mess in your room.     A. always throw                                 B. have always thrown        C. are always throwing                       D. have always been throwing