问题
选择题
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
答案
答案: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。