1.—_______ pencil case is that?—It’s Mary’s. 2.—_______ knives do you have?—I have three. 3.—_______ is your sister?—She’s twelve. 4.—_______ is your friend?—Peter and Jill. 5.—_______ is that?—It’s cherry juice. 6.—_______ does the juice taste?—It’s sweet. 7.—_______ is my book?—It’s on the desk. 8.—_______ is that glass of juice?—It’s ten yuan.