多选题 Freedom of expression is not necessarily a ______ force: communities that encourage it often feel less threatened by social unrest than do those in which dissent is ______.
【正确答案】 C、F
【答案解析】[解析] ●冒号说明前后同义重复；less...than...说明前后反义重复。
●第一空与unrest(动荡)同义重复。militant好战的，positive明确的，divisive制造不和的。答案选C。
●第二空与freedom(自由)反义重复。promote促进，foster促进，restrict限制。答案选F。