多选题
In the past, paintings by Black American artists often were ______; in contrast, many art critics today advocate an understanding of the works of Black artists as ______ to appreciating America"s diverse heritage.
【正确答案】
A、D
【答案解析】[解析] ● in contrast说明前后反义重复。
● 第一空与advocate(提倡)反义重复。slight轻视，praise赞扬，study研究。答案选A。
● indispensable必不可少的，obvious显然的，indifferent冷漠的。代入选项，答案选D。