Green is the color of _______ nature. And you can enjoy the colorful rainbow in _______ sky after the rain.

You’re dropped __________ “s” in the word “across”.－Oh, you are right, __________ letter “s” should be doubled like this “cross”.

What are you going to do this weekend? —I _____ yet.

Will there be more people in the future ? — No, ________. There will be fewer people.

Your notebook ____ Li Lei’s notebook. [ ]