短文改错（共10小题；每小题1.5分，共15分）

下面短文中有10处语言错误。请在有错误的工方增加、删除或修改某个单词。

增加：在缺词处加一个符号（^），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意： 1. 每句不超过两个错误；

2. 每处错误及其修改均只限一词；

3. 只允许修改10处，多者（从第11处起）不计分。

Today we had a chemistry test. I found the test difficulty, but I tried hardly to do it. Suddenly Mary, my best friend, asking me to let her to copy my answers. After think for some time, I let her copy my answers. But after the test, all of us were called to the teacher's office. The teacher was angry because we had same answers in the tests. We were warned not to cheat again so she would need to see our parents. I was very upset. I didn't cheat. I was just helping a friend. Why does she punish me?

– Why does she look so tired?

-- She ________ all the morning and she still hasn’t finished it.

A. cleaned  B. was cleaning C. has been cleaning    D. has cleaned

— Why does she always ask you for help?

— There is no one else ________, is there?

A. who to turn                       B. she can turn to

C. for whom to turn                  D. for her to turn

---Why does she always ask you for help?  ---There is no one else ________, is there?

A．who to turn to      B．she can turn to     C．for whom to turn    D．for her to turn

--- Why does she always ask you for help?

?? --- There is no one else____, is there?

A. who to turn to????????????????????????? B. she can turn to

C. for whom to turn??????????????????????? D. for her to turn