Some people waste a lot of food others haven’t enough to eat.A. howeverB. whenC. asD. whi

问题补充：

Some people waste a lot of food others haven’t enough to eat.

A. however

B. when

C. as

D. while

答案：

A. however

B. when

C. as

(答案→)D. while

解析：while表示两者对比译为“然而”。句意：有些人浪费大量的食物然而有些人没有足够的吃的。