________youressaycarefullybeforeyouhandi
题型:选择题
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
________ 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