It may be necessary to stop______in the learning process and go back to the difficult points in the lessons.

He likes to play ____ football, but I like to play _____ piano.

I wonder if I can learn English well.—______．All things are difficult before they are easy.

Please _______all these things,Tony.I don’t need them.

u think it’s a good idea to makefriends with your students —_______, I do I thinkit’s a great idea