单项选择题
A. 你一定希望能买到最经济及最有价值的东西。 B. 你肯定对经济实惠又赚钱的买卖感兴趣。 C. 你肯定对价廉物美的商品感兴趣。 D. 你一定希望做一本万利的买卖。
A. will have worked B. will have been working C. would have been working D. has been working
A. being of some use B. be of some use C. to be of some use D. of some use