You never know_____happiness will turn up next, so grasp every chance around you [ ]

My parents used _____ they had to get a new car for my brother.

I’m afraid I’m not _____to help with the talent show, for I am fully occupied with my own project.

This term all the teachers in Xinghua are thinking about ___________ to make the students learn better by changing their teaching ways.

Being determined is a good quality and that’s_____it takes to do anything well.