— I didn’t go to Tom’s birthday party yesterday. What about you?— ________, because I was preparing for the exam all the time.
Bob doesn’t know _____ to write about.
We must be strict _____ ourselves and strict _____ our work.
Now more and more people prefer__to__in order to reduce the air pollution.
They would rather___colours like orange or yellow than blue or white.
Do you like ____ books ?