题目

同义句转换    1. It’s necessary to study hard in the school. You ________ study hard in the school.    2. I got a letter from my father yesterday.      I _______ ______ my father yesterday.    3. You must not bring your dog to your school.      ________ _______  your dog to your school.    4. Finally, we got to the cinema in time.     _____ _____ _______, we arrived at the cinema in time.    5. There’s nothing else in the fridge.      There ______ ______ else in the fridge.    6. The boy is five years old, he lost his way in the street last we关于x的方程（a-6）x2-8x+6=0有实数根，则整数a的最大值是（　　）A．6B．7C．8D．9