The size of the audience is expected is more than thirty thousand.A. asB. whatC. thatD.

问题补充：

The size of the audience, is expected, is more than thirty thousand.

A. as

B. what

C. that

D. whom

答案：

(答案→)A. as

B. what

C. that

D. whom

解析：题意：正如所预料的，观众的数量达到三千多。as 引导非限制性定语从句，指代整个句子的内容。