If you had (听从了我的劝告，你就不会陷入麻烦)
答案：followed my advice, you would not be in trouble n
I prefer to communicate with my customers (通过写电子邮件而不是打电话)
答案：via E-mail instead of telephone
(直到截止日他才寄出)his application form.
答案：Until the deadline came, he didnt send out