问题
选择题
If you ________ talk about it with me, please wait till I finish my work at hand. [ ]
A. can
B. may
C. must
D. should
答案
答案：C
搜题请搜索小程序“爱下问搜题”
If you ________ talk about it with me, please wait till I finish my work at hand. [ ]
A. can
B. may
C. must
D. should
答案：C
现有甲、乙、丙、丁四个相互独立的投资项目，其投资额和净现值见下表(单位：万元)：
| 方案 | 甲 | 乙 | 丙 | 丁 |
| 投资额 | 500 | 550 | 600 | 650 |
| 净现值 | 239 | 246 | 320 | 412 |
A．项目甲、项目乙和项目丙
B．项目甲、项目乙和项目丁
C．项目甲、项目丙和项目丁
D．项目乙、项目丙和项目丁