It’s reported that a subway system will be _____ use in 2020 in Taiyuan.

Tom, I regret ________ you that you didn’t pass your final examination.— Oh, my God! I regret ________ too much time which should be used to study.[ ]

He spoke proudly of his part in the game, without mentioning ________ his teammates had done.

Compared ordinary dolls, Barbie Dolls sell well, whose prices range 5 dollars to 100 dollars

Don’t forget to give me best wishes to you mother.—___________.