---I _________ stay up late. ---Really? I didn’t. But I ______ working in the night.
— Could you teach me how _________ cakes? — Sorry, I don’t know.
I find _______necessary to do everything we can ____________protect the environment.
________ Lucy’s pictures. They are nice.
Tom likes reading books when he ________.
---________ doesn’t Jim look happy today? ---He _______ happy because he doesn’t do well in his English.