问题补充：
My mobile phone has broken. I must .
A. get down to repair it
B. have it repair
C. get down to repairing it
D. have it to be repaired
答案：
A. get down to repair it
B. have it repair
(答案→)C. get down to repairing it
D. have it to be repaired
解析：可联系答.案.网客服索取。
