Ⅰ.用适当的情态动词或所给词的正确形式填空
1．The weather was bad.We had to wait for two hours at the airport before we took off.
2．— Must we finish the composition in class?
—No，you needn't/don't have to.
3. He is so strong that I dare not fight against him.
4. We should have received (receive) the letter yesterday，but it didn't arrive.
5. When we got to the cinema，the film hadn't started yet，so we needn't have hurried (hurry)．
