Question

__________ 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?

Answer 1

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。