Are you familiar _____________ the rules of baseball?
—What’s that ____ English? —It’s a desk.
英语中共有______ 个字母,其中______个元音字母。
—What color is it? —It’s _____.
—______is this girl? —She is my sister. —______do you spell “sister”? —S-I-S-T-E-R.
—______your schoolbag? —It’s on the sofa.