问题
选择题
__________ is announced in today’s paper,they have succeeded in solving many problems in accordance with the new theory.
A．It
B．That
C．What
D．As
答案
D
非限制性定语从句的考查。本题考查学生对非限制性定语从句和形式主语的区别。句中逗号将前后两句分开,可判断出该句为非限制性定语从句。关系代词放在句首作主语只能用as。