题目内容：

阅读下面材料，在空白处填人1个适当的单词或括号内单词的正确形式。

With a population of 602,000, Luxembourg is one of the richest smallest1.(country) in Europe -- yet it suffers from major traffic jams.

Taking up 2,586 square kilometers, Luxembourg is roughly the size of Rhode Island. From the capital of Luxembourg City, Belgium, France and Germany can all2.(reach) by car in half an hour.

Luxembourg is a very3.(attract) place for jobs,4.its “booming economy” and high concentration of jobs have led to congestion(拥塞)issues. In 2016, Luxembourg had 662 cars per 1,000 people, and5.(drive) is a “primary means of transportation” for commuters. That year, drivers in Luxembourg City6.(spend) an average of 33 hours in traffic. It fared 7.(bad) than European cities Copenhagen and Helsinki, which have comparable population sizes to all of Luxembourg -- yet it only took drivers in both an average of 24 hours in traffic.

But that could be about to change.8.country at this very moment is in really good shape, thus the government wants the people to benefit9.the good economy. As of March 1, 2020 all public transport-trains, trams and buses-in the country is free,10.(make) it the first free public transport country in the world. The government hopes the move will alleviate heavy congestion and bring environmental benefits.