I'm busy now. I'm sorry I can't help ____ the flowers.

A. watering B. watered C. waters D. to water

短文改错
此题要求改正所给的短文中的10处错误。要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
注意：1.每处错误及其修改均仅限一词。
2.只允许修改10处，多者（从第11处起）不计分。
Dear Mr. Brown,
Thank you for invite me to stay with you in London in the coming vacation. I had dreamed of seeing you again so that I can get more help from you in mine English learning. And I’m afraid I can’t go to your place in this summer, because I have promised my grandmother, she lives in the country, to spend the summer with her. She misses me too much that I find that difficult to say no to her. I’m busy now preparing for several exam. I plan to visit you in winter if it okay with you.
Best wishes,
Li Ming

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，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. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者(从第11处起)不计分。
Dear Mr. Brown,
I’m very thankful to you for invite me to stay with you in London in the coming vacation. I have been dreamed of seeing you again so that I can get more help from you in mine English learning. And I’m afraid I can’t go to your place in this summer. Because I have promised my grandmother, she lives in the country, to spend the summer with her. She misses me too much that I find that difficult to refuse her request. I’m busy now preparing for several examinations. I plan to visit you in winter if it convenient to you.
Best wishes.
Li Ming

-- Bob, please go and buy some vegetables for me. I’m busy now.
-- Can you be more ________， mum?
-- Some tomatoes and a cabbage.

Not that I'm unwilling to go with you, ________I'm busy now.

1. A.
   because
2. B.
   but
3. C.
   but that
4. D.
   however