________ all the homework assigned by th

问题选择题

________ all the homework assigned by the school, the students have to work at it till midnight.

A．Completing

B．To complete

C．Having completed

D．To have completed

答案

答案：B

B 考察非谓语动词。句义：为了完成学校布置的所有作业，学生们不得不写作业到深夜。根据句义可知此处用动词不定式做目的状语。故B正确。