第11题: [单项选择]The class ______ doing experiments on heat and light in the laboratory, and this afternoon this class ______ going to have its picture taken. A. is; is B. is; are C. are; is D. are; arc 参考答案:C 答案解析:[解题指要] 该题测试集合名词的用法。集合名词如family,crowd,class等,指全体时用单数动词,指人时用复数动词。在第一句中the class指全体学生,作为复数用。后半句中通过its可看