______known to us,_______ increasing number of students are buried in their studies.
| A．What is;a | B．It is;the | C．As it is;the | D．As is;an |
. I could tell he was surprised from the _____ on his face.
| A．appearance | B．view | C．sight | D．expression |
The book seems to have been _____ from various books and articles.
| A．pieced together | B．taken off | C．broken away | D．pulled out |
It is not profitable to provide bus services in districts where the population is widely _____.
| A．scattered | B．dismissed | C．separated | D．spread |
. In aerospace devices the weight of the necessary power producing equipment is _____.
| A．vital | B．possible | C．capable | D．reliable |
There was a good _____ of the countryside from the front of the bus.
| A．sight | B．view | C．scene | D．scenery |