________ your essay carefully before
| ________ your essay carefully before you hand it in, some mistakes can surely be avoided, I think. |
| [ ] |
| A. Having checked B. Check C. As long as you check D. While checking |
可能相似的问题
| ________ your essay carefully before you hand it in, some mistakes can surely be avoided, I think. |
| [ ] |
| A. Having checked B. Check C. As long as you check D. While checking |