—I’m busy with my schoolwork these days.
—That’s great! You won’t get good grades ______ you work hard.
| A．if | B．because |
| C．unless | D．after |
—________．Is this your baseball, Jane?
—Yes, it is．Thank you．
| A．Sorry | B．Excuse me |
| C．Excuse | D．Nice to meet you． |
Here _______ two nice photos ________ my family．
| A．are; of | B．is; of |
| C．are; for | D．is; for |
—Thank you for your help, Mr. Liu．
—__________．
| A．You're welcome． | B．Don't thank． |
| C．Thanks! You, too． | D．I'm sorry． |
—Is that _________ schoolbag?
—No, it isn't．It's _______．
| A．he; hers | B．hers; his |
| C．he; his | D．his; hers |
—Where are my pencils?
—________．
| A．It's on the table． | B．Yes, they are, |
| C．Sorry, I don't know． | D．They are pencils． |