49.According to the essay, business invitations fall into the following two categories:
(A) formal and informal
(B) email and invitation paper
(C) handwritten and printed
(D) the public and a selected group of people
================= 49.49.According to the essay, business invitations fall into the following two categories: (A) formal and informal (B) email and invitation paper (C) handwritten and printed (D) the public and a selected group of people 答案:A 49.49。根據這篇短文,商務邀請函可以分為以下兩類: (A)formal and informal 正式和非正式 (B)電子郵件和邀請函 (C)手寫和印刷 (D)公眾和選定的一組人 答案:A