要求： 推荐给Linda 适合旅游的地点，并说明理由，同时给出一些建议或者注意事项。字数：70词左右。

Dear Linda,

I think you'll have a good time in China!

Yours,

Betty

直接写出得数．

若不等式﹣1＜ax²+bx+c＜1的解集为（﹣1，3），则实数a的取值范围是____

    My grandpa often goes for a____in the park. He never loses his way.

    But yesterday, a police car____him home. A police officer told (告诉) me that my grandpa was____in the park.

    When the police officer went away, I asked grandpa, "What's____with you today?" "Nothing, I just felt____and I didn't want to walk home. So I called the police and they took me home."