14．The Group of Eight is an international organization ________ the richest countries in the world，five of which are quite small and two of which are island states.
A．is consisted of B．consisting of
C．consists of D．consisted of
答案 B [consist of 无被动。]
15．I had wanted to help you last night but I couldn't spare any time，for I ________ a composition which I have to hand in this morning.
A．wrote B．was writing
C．had written D．have written
答案 B [此处表示“我当时正在写作文”。 ]
