_____ a smile on his face, he came into the classroom.
The Art Festival _______ in our school next month.
—Why not watch the popular TV program “If You Are The One” (非诚勿扰)?—_________________.
If you work hard and never __________, you will learn Maths well.
—Mother’s birthday is coming, I’ll make a card for her. Please keep it secret.—_____________.I won’t tell anybody about this.
Cycling isn’t _________ climbing, but both of them are interesting.