The teacher with 6 girls and 8 boys of her class visiting a museum when the earthquake

问题补充：

The teacher, with 6 girls and 8 boys of her class, visiting a museum when the earthquake struck.

A. was

B. were

C. had been

D. would be

答案：

(答案→)A. was

B. were

C. had been

D. would be

解析：考查主谓一致。with连接两个主语，谓语动词根据前一个主语决定，故用单数，根据语境用一般过去时，选A。