题目内容：
________ your paper carefully before handing it in, I think, some grammar mistakes can be avoided.(本题1.0分)A、 Having checked
B、 Check
C、 As long as you check
D、 While checking
参考答案：
选择题：________ your paper carefully before handing it in
- 题目分类：河南工业大学-工程造价-大学英语（一）
- 题目类型：选择题
- 查看权限：VIP
A、 Having checked
B、 Check
C、 As long as you check
D、 While checking