The famous singer Cong Fei did all he could the children who lose the chance to school.

问题补充：

The famous singer, Cong Fei, did all he could the children who lose the chance to school.

A. and help

B. help

C. to helping

D. to help

答案：

A. and help

B. help

C. to helping

(答案→)D. to help

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