Do you still remember when we went to Nanjing?　　　　— I can’t remember now but ________sometime last summer?

Is this school ______you studied in three years ago?

_____ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.

rder happened in an old building,beside ______ the city police station

Bill, please turn down the music, ________Mum ________ Dad are sleeping.—Sorry, I’ll do it right away.