问题
选择题
| Maths is not easy to learn ______ we must work harder. |
A. but B. or C. and D. so |
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| Maths is not easy to learn ______ we must work harder. |
A. but B. or C. and D. so |
答案：D