25. The only language ____is easy to learn is the mother tongue.
I’m sorry, but I didn’t mean to keep you waiting here for a long time. Can you______ me?
They may start as a group of high-school students, ____ practising their music in someone’s house is the first step to fame.
If George keeps on working so hard, he’ll ______ sooner or later.
We, teenagers, have already had the ability to take care of our daily life __________.
I think she would appreciate ________ if we could all help out a bit more.