—Have they come here________？
—Yes，they have come here________．
| A．yet；yet |
| B．already；already |
| C．yet；already |
| D．already；yet |
_____ very important to have good eating habits.
| A．That’s | B．It’s | C．He’s | D．This is |
Are they getting ready _____ the exam?
| A．for | B．to | C．at | D．in |
Listen! Someone ______ in the next room.
| A．sing | B．singing | C．is singing | D．are singing |
Please connect the keyboard the computer.
| A．in | B．at | C．to | D．on |
--do you open a new document ?
---Click “new document “.
| A．How | B．Where | C．What | D．When |