—The charity walk begins _______ 9.00 a.m. Don’t be late. —No problem.
—John, ______ do you visit your grandparents?—Once a week.
I’ll never forget the lesson ______ last year.
On my visit to Australia, I feel Australians are similar ______ us in many ways.
I hope everyone can care about ______ the environment and stop ______ things.
By reading the article, we know how ______ in our daily life.