单选题 It is anticipated that this contract will substantially increase sales over the next three years.

【正确答案】 C

【答案解析】[解析] 句意：据估计，这份合同会使销售额在未来三年里有相当大的增加。substantially本质上，实质上；相当多地。considerably相当大地，巨额地。apparently显而易见地；外表上地。slightly轻微地；细长地。steadily持续地；稳定地，稳固地。