Question

The headmaster demanded all the teachers ______ in the office. A．mustn’t smoke B．did smoke

The headmaster demanded all the teachers ______ in the office. A．mustn’t smoke B．did smoke C．should smoke D．not smoke

Answer 1

D

试题分析：考查虚拟语气：句意：校长要求所有的老师不要在办公室抽烟。根据句意排除BC，主句的谓语是demand，从句的谓语用虚拟语气，用should+动词原形，should可以省略，选D。