题目内容：
________ your paper carefully before handing it in, I think, some grammar mistakes can be avoided.(本题5.0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：河北工业大学-会计-大学英语(一)(高起专...）
- 题目类型：选择题
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A、 Having checked
B、 Check
C、 As long as you check
D、 While checking