Professor Smith, along with his assistants,____ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
As is known to all, ___ People’s Republic of China is ___ biggest developing country in the world.
| A．the;不填 |
| B．不填; the |
| C．the; the |
| D．不填;不填 |
—Sorry I’m late.I got stuck in traffic.
—___.You’re here now.Come in and sit down.
| A．You are welcome |
| B．That’s right |
| C．I have no idea |
| D．Never mind |
It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ___.
| A．symptom |
| B．similarity |
| C．sample |
| D．shadow |
Internet is as___to learning as the ability to understand, even more so.
| A．vital |
| B．available |
| C．specific |
| D．similar |
报纸包含了一系列标题，提供了很多信息。(variety)
Newspapers offer information, and they also cover ___ ___ ___ topics.