Although the machine is _______, you need to use it correctly and safely

There must be hundreds of people on the coach. It seems hopeless for us to _______! Let’s go home now.

Korean Star PSY’s “Gangnam style” video, ___, has set the Guinness World Record for the most “liked” video in Youtube history.

essor Lee is considering going toteach in Shenzhen, where he can get paid_________.

This picture reminded me of those days ______ we spent very happily and the hut ___ we could look over the valley.