【简答题】We shall not drown (淹死) if we remember these rules: 1, Never swim alone. 2, Never swim at a beach if there is no lifeguard (救生员) . 3, Never swim after a meal or when you feel hungry or tired. 4, Nev...
【简答题】用must to 和have填空。 1. Lora ____________ wait for another three hours because the plane was late. 2. You _______ hurry. I’m sure you can arrive there in time. 3. — _______ I hand in the exercises today?...