He ate what he could and gave the of the food to the birds.A. remainB. uneatenC. restD.

问题补充：

He ate what he could, and gave the of the food to the birds.

A. remain

B. uneaten

C. rest

D. part

答案：

A. remain

B. uneaten

(答案→)C. rest

D. part

解析：the rest (of)剩余部分，其余。remain作“剩余物”(=what is left)解时常用复数形式，如：the remains of a meal(残羹剩饭)。[ALI]《新英汉辞典》认为也可以用单数，可作参考。