_______— does the history lesson start?
—At nine o'clock. Let's go at once.
A. What B. When C. How
—What’s your mother__________ now？
—She’s __________ our house.
| A．doing, clean | B．do; clean |
| C．does; cleans | D．doing; cleaning |
Look, Tony __________ a delicious ice-cream over there.
| A．is eating | B．eating | C．eats | D．eat |
—Are you from America?
—__________.
| A．Yes, I am not. | B．No, I do. | C．Yes, I am. | D．No, not. |
— I like math very much. Do you like math?
— __________.
| A．No, I do. | B．Yes, I do. | C．Yes, you are. | D．No, I am not. |
—Is your mother _________ English teacher?
—No, she isn’t. She is _________doctor.
| A．a; an | B．an; a | C．the; a | D．an; the |