As is natural, a man as old as he ____ be very forgetful.
There’s somebody walking behind us. I think ___.
The girl devoted all her free time she had __ others.
—Jane, see, what did I find?—Oh, my lost keys! ____.
Jack, it’s __ bad manners to blow your nose at ___ table.
— What terrible weather! It ___ for more than a week!—The rain season will last about a month.