More than 100 students in that school_________ abroad for further study so far.
| A．are sent | B．were sent | C．had been sent | D．have been sent |
While the soldier’s idea was interesting, the system was too difficult to be ____.
| A．of practical use | B．practical usefully |
| C．practice use | D．practice used |
In old days, books for blind people used paper ____ against metal wire to form letters.
| A．to press | B．pressing | C．pressed | D．which pressed |
One winter day ____, he saw the tracks of animals in the snow and observed that the appearance of each one was different.
| A．while he hunting | B．while hunting |
| C．while he hunt | D．while hunted |
People from the West like to use these words in cases ____ some people in Asia may not think it necessary.
| A．which | B．that | C．what | D．Where |
The manager would like to offer the position to ____ is fit for it.
| A．who | B．whomever | C．whoever | D．Whichever |