单选题 The __between rich and poor is getting bigger andbigger in some places.

单选题 Hourly output by workers __1.3% in the first quarter.

单选题 There is no reason__he should refused to join us.

单选题 There are good opportunities to learn skills __the job.

单选题 Some of these methods will work,but __will not.

单选题 The country is suffering from a __of food l.

单选题 Do you think the films is worth __?

单选题 The boy acted __he didn’t know me.