根据句意和汉语提示写出单词，完成句子。
Our school is very big and there are more than four _____________(千) students in it．
The Spring Festival usually comes in January or _____________(二月)．
The_____________(努力) you work , the more progress you’ll make．
Poor Jack felt _____________(紧张不安的) when he went to his manager’s office．
Nobody is _____________(缺席) , so let’s begin our meeting．