Joe won the first prize on Sunday and, tears rolling down his cheeks, it a turning point for him[ ]

Do you know our hometown at all? —- No, this is the first time I ____ here

Our maths teacher set so difficult an examination problem ______ none of us worked out.

He has been working hard day and night, which, of course,his tiredness.

(2009福州市高中毕业班第一次单科质量检查)—What will you do for the poor children? —I am planning toa large number of books to them.