问题补充：
“I’m certainly more and more to the conclusion that Iraq has, they maintained（断言）, destroyed almost all of they had in the summer of 1991.” Blix said.
A. which, what
B. as, which
C. as, that
D. as, what
答案：
A. which, what
B. as, which
C. as, that
(答案→)D. as, what
解析：关系代词as引导非限制性定语从句作maintain的宾语;在宾语从句中缺少宾语，应用what引导。故选D。
