When the reached the top of the hill, they _____ so they had to stop for a rest.

Chinese new traffic rules in 2013 give more severepunishment to offenders compared with ______ carried out in previous years.

_____ do you _____ the book —It’s very interesting.

To _____ good relationships with your teachers and classmates ,you should learn to share ups and downs with them.

I find it’s ___ hard ___ understand the Englishmovies.