What does the underlined word 'litter' mean in paragraph 2?
A.Not many.
B.Serious problem.
C.Bits of waste things.
D.Industrial pollution.

A.Not
B.
B.Serious
C.
C.Bits
D.
D.Industrial

【参考答案】

C
解析：语义题。根据第二段第二、三、四句列举的例子可推断出litter意为“垃圾”，故选C。