Textbooks for junior students ______ for free in most areas of China．（ ）A. provideB. providedC. are provided

Textbooks for junior students ______ for free in most areas of China．（ ）A. provideB. providedC. are provided

答案：C

联系语境，根据本句的主语为textbooks，结合选项谓语动词为provide，可知主语为谓语的动作承受者，指课本被提供，所以应该用被动语态；结合句意可知本句描述的为客观事实，所以应该用一般现在时，故此句应该用一般现在时的被动语态来表达，其构成为：am/is/are+过去分词；本句的主语textbooks为复数，所以用are，provide的过去分词为provided，故选：C