主要用于预防Ⅰ型变态反应所致哮喘的药物是（）
A.氨茶碱
B.肾上腺素
C.特布他林
D.色甘酸钠
E.异丙肾上腺素
参考答案：D
将下列句子变为否定句。
1. I have lunch at school.
I ______ ______ lunch at school.
2. We watch TV in the evening.
We ______ ______ TV in the evening.
3. They play football after school.
They ______ ______ football after school.
4. Lucy and Lily like music.
Lucy and Lily ______ ______ music.
动车组列车只发售（）学生票，学生票为全价的（）。
