题目

完形填空。As we all know, Chinese students are hard-working. But they’re _______at the same time.At school, they have to follow the strict school _______ . For example, they _______ have long hair or wear strange (奇怪的) clothes.And at home, they’re always busy with their homework and they don’t have any free time to do what they like. Once (一旦) they don’t do well in exams, their parents will lose _______ for them.On weekends, their parents tell them to take part in different classes they don’t like. They always feel _______ and bored. They _______ interest in school th若f(x)＝－x2＋bln(x＋2)在(－1，＋∞)上是减函数，则b的取值范围是(　　)A．[－1，＋∞) B．(－1，＋∞)C．(－∞，－1]D．(－∞，－1)