It is not doing the things we like, but liking the things we have to do ______ makes life happy.
Would it be ____for you to pick me up at four o’clock and take me to the airport?
I must be getting fat—I can ______ do my trousers up.
Do you think it's a good idea to make friends with your students? — ____, I do. I think it's a great idea.
______well prepared you are, you still need a lot of luck in mountain climbing.
Jack is late again. It is ________ of him to keep others waiting.