下列哪些是治疗结核病时应首先选用的药物（）

A.异烟肼

B.对氨基水杨酸钠

C.利福平

D.胺丁醇

E.氨硫脲

根据句意和汉语提示写出单词，完成句子。

小题1:Our school is very big and there are more than four _____________(千) students in it．

小题2:The Spring Festival usually comes in January or _____________(二月)．

小题3:The_____________(努力) you work , the more progress you’ll make．

小题4:Poor Jack felt _____________(紧张不安的) when he went to his manager’s office．

小题5:Nobody is _____________(缺席) , so let’s begin our meeting．