Question

In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.

A．however

B．although

C．as

D．while

Answer 1

D

考查连词。However 然而，although 虽然，as 因为，while 当什么时候，然而（表示对比）句意：在美国许多人浪费了很多食物，然而在非洲人们没有足够的吃的。故选D。