问题描述：
5.I don’t really understand what you mean .Could you give me an e________.
6.The train met with an a _______ and many passengers were killed .
7.The animals are s________ in the zoo ,but are not so happy .
8.I think the show starts at half past seven,but I’m not s_______.
6.The train met with an a _______ and many passengers were killed .
7.The animals are s________ in the zoo ,but are not so happy .
8.I think the show starts at half past seven,but I’m not s_______.
问题解答：
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