试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(possible) Unless there is some change in the economy, there is a 
that the plant may close.
参考答案
试题解析
冠词修饰名词，所以空格处应该填名词。变形容词possible为名词possibility。
句意：除非经济发生变化，否则工厂可能会关闭。