—Let’s go to the zoo on Sunday.—________.A.Good idea. B.Here you are. C.Nice to meet you.
Do you have other _____ to make on the subject?
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.