During the next ten years she had to work hard for the necklace.A. payingB. to payC. for

问题补充：

During the next ten years, she had to work hard for the necklace.

A. paying

B. to pay

C. for paying

D. in order to paying

答案：

A. paying

(答案→)B. to pay

C. for paying

D. in order to paying

解析：用不定式可以表示目的。