下列各句中，没有语病的一项是（ ）

下列句子中，划线词语使用恰当的一项是（ ）

I’ m tired outI ______ all afternoon and I don’t seem to have finished anything

Do you know ______ man under the tree——Oh, he is _______ university teacher.

_____ learn more knowledge, the students stay at school on Sunday