—These days，he has stayed up late into night in order to get good marks in the following monthly test.—It's no ________ that he seems tired and asleep in class every day.

When we are getting excited, angry or scared, our bodies also ______many physical changes.

A society cannot be successful if it throws tradition away，but it cannot be successful ________ if we do something to stop progress.                                

----What do you think of the stand-up TV show by the comedian Zhou Libo?----I can’t help           it. I got           whenever I watched it!

I said hello to her with a smile in the yard, but she ________ me.