So far it has been suggested that special stress on pre-school education.
A. is laid
B. be laid
C. has been laid
D. have been laid
网友回答
A. is laid
(答案→)B. be laid
C. has been laid
D. have been laid
解析：句意：到现在为止，一直有人建议要重视学前教育。it has been suggested that…句型中，that引导的是主语从句，从句的谓语用虚拟语气：should do，should可以省略，而且词组“特别重视”lay special stress on，所以用被动语态，选B。