the plan has been made let’s get down to it out.A. Now that; carryB. Because; carryC. S

问题补充：

the plan has been made, let’s get down to it out.

A. Now that; carry

B. Because; carry

C. Since; carrying

D. Now; putting

答案：

A. Now that; carry

B. Because; carry

(答案→)C. Since; carrying

D. Now; putting

解析：get down to（doing）sth.表示“开始认真做事”，now（that），since均表示“既然，由于”。