—Is there anything wrong, Bob? You look sad.—Oh, nothing much. In fact, I __________ of my friends back home.
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.
A cough is usually nothing to worry about unless it lasts for ten days ___.