Though flu is a      disease,it can cause death.

 If you want to make progress, you’d better be strict _____ yourself ______your studies.

When I enter this classroom, I always feel the ______ pressure of study, for I have so many opponents to compete with. 

—Did you enjoy yourself at the part—Yes. I’ve never been to ________one before.

To work from home, which one could hardly imagine, has been made         with the development of computer technology.