would you like to join us.的回答,选择哪个?为什么?1.of course not2.i am busy3.sorry,i won't4.sure.what is it?
问题描述：
would you like to join us.的回答,选择哪个?为什么?
1.of course not
2.i am busy
3.sorry,i won't
4.sure.what is it?
答
choose number4
because this way is polite and also right in grammer