Due to the unreasonable individual income _______, the gap between the rich and poor has become an outstanding issue.
His proposal is so idealistic that there are many______difficulties in putting it into practice.
As nobody here knows what is wrong with the machine, we ________send for an engineer to handle the problem.
The Spring Festival, a traditional Chinese festival, is celebrated in________Asian countries.
Can you think of some cases ______-people are likely to tell lies?
—Shall we go out for a walk? —Sorry. I’m too busy to ______-for the moment.