I sometimes help my mom with her housework____________ Saturdays.
| A．at | B．in | C．on | D．to |
There are ______ stars in the Galaxy. We can’t count them.
| A．billion of | B．billions |
| C．billions of | D．billion |
—Oh, Jack, your MP4 player looks nice. Is it new?
—No. I ______ it for two years.
| A．am having | B．bought |
| C．have had | D．have bought |
—Li Lei isn’t in the classroom. Where is he?
—He ______ to the teacher’s office.
| A．is going | B．has gone |
| C．has been | D．will go |
With the help of the Internet, news can ______ every corner of the world.
| A．arrive | B．go |
| C．reach | D．get |
—I lost my MP4 player on my way to school this morning.
—______ You must be careful next time.
| A．What a pity! | B．Don’t worry. |
| C．That’s interesting. | D．Good luck! |