—Is your brother a League member?

—Yes, he _____ the League three years ago. He _____ a League member for three years.[ ]

A. joined; has been

B. has joined; has been

C. was joined; is

D. joined; was

邀请招标的特点是()。I•发布招标公告;II.发投标邀请函;III.邀请不特定的法人或其他组织;Ⅳ.邀请特定的法人或其他组织

A.I、Ⅲ

B.I

C.Ⅱ

D.Ⅱ、Ⅳ