The needy children hard _______food.They need ______

The needy children hard _______food.They need ______

题目
The needy children hard _______food.They need ______
A.worked; for; to help B.worked; on; to help
C.are working; for; helping D.are working; for; to help
答案
needy 贫穷的
D are working; for; to help
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