--- I’m not good at singing, you know. --- . It’s just for fun.
The little boy sat ________to his father and listened ________with great interest.
As the school term ends,New York is no closer to _______its shortage of teachers than it was earlier in the year.
He ________who the murderer was before the end of the book.
Thank you very much for all you've done for me,which is ________great value to me.
Premier Wen said,“I once again emphasize that it is absolutely unacceptable to sacrifice people's life and health ________the economic development in any case.”