Question

The new teaching building ________ before the new term begins.

A．must be finished	B．must finish
C．must finished	D．must being finished

Answer 1

A

试题分析：句意：新的教学大楼必须在新学期开始前完工。结合语境可知本句主语为动作对象，故用被动语态，选A。
点评：此类题型主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态。