第33题: [单项选择]The background music in an assembly line is designed ______. A. being not listened to B. not being listened to C. to be not listened to D. not to be listened to 参考答案:D 答案解析:[题意]流水线的背景音乐被设计者设计地根本听不见。
[解析] 题干中design后一般接动词不定式,由此排除[A]和[B];又因为动词不定式的否定结构是not + to do sth. 故答案为[