如果一个投资者看空某一期货合约，那么他将不会( )
A．购买看跌期权
B．出售看涨期权
C．买入该期货合约
D．卖出该期货合约
参考答案：C
There is no doubt at all________she will call us when she gets there. [ ]
A. if
B. whether
C. what
D. that
