a lot of work to do all the workers are not allowed to take their holidays.A. BecauseB.

问题补充：

a lot of work to do, all the workers are not allowed to take their holidays.

A. Because

B. For

C. Since

D. With

答案：

A. Because

B. For

C. Since

(答案→)D. With

解析：本题中介词用来构成一个介宾复合结构。