第14题: [单项选择]The mother insisted that her children on not coming back home later than ten o’clock. A. not to come B. not come C. not coming D. will not come 参考答案:B 答案解析:在诸如require, demand, suggest等动词之后，其从句的谓语动词应该用should do或do的动词原形。
A. must have a rope tied to your ankles B. must jump from tall buildings C. should jump above the sea D. should keep yourself safe 参考答案:A 答案解析:[解析] 细节题。第二段第二句You jump from a high place 200 meters above the ground with a rope tied to your ankle
