一Why were n’t you at the meeting?一I for a long distance call from my sister in America·
— You should be careful when ________. — Yes, I will. I’d like to know when ________ to have a rest.
I prefer ________ at home ________ some reading to ________ shopping.
It’s selfish ________ him ________ the cakes with others.
This is _______ song I have introduced you many times. Isn’t it _______wonderful one?
--- Come on, everyone! We must be the first to complete the poster for the charity show. ---Sure.____________.