Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
In order to relieve the heavy traffic in Beijing, the departments concerned have made a （ ） plan.(long, term)
【正确答案】：LONG-TERM
【题目解析】：
根据前文a，后文plan，说明空格处应该填形容词形式，long长的，term期，可以合成long-term长期的，且符合句意。句意：为了缓解北京的交通拥挤，有关部门制定了一个长期规划。