They are going to have a crazy party ___ Christmas Eve.
She doesn’t want to do it; we have to find ____ to do it.
----Can he work out the maths problem? ----I think _____ hard for him to work it out.
_____speak more English in class?
---It’s very important _____ us to make plans before a new term. ---Yes. You must try to make it carefully.
He tries ____ English well, so he practises _____ English every day.