———May I try the jacket on? ————______ , but I think it will be too small for you.
Upon ______the classroom, I started thinking about my mother.
Although it had been________ struggle for him to finish______ experiment, he enjoyed the result with________ satisfaction.
The map is one of the best tools a man has ________ he goes to a new place.
It is reported that the local police ________ the case of two missing children, but no much progress has been made up to now.
— I went to the live concert yesterday and didn’t know what happened in the school. — ____________ .