This is ____ book I bought yesterday. Isn't it _____useful one?
—Let’s play ping–pang! —Good idea, _______ I don’t have a bat.
—I did badly in my English exam. — _______.
— Excuse me. May I know your _______?— OK. It's No. 3. Zhongshan Road.
—Can you play tennis _______ me?—Sure, I' d love to.
—Who’s that boy?—He is my cousin, and _______ name is Jack.