Only by increasing the number of doctors by 50 percent ________ properly in this hospital.
| A．can be the patients treated |
| B．can the patients be treated |
| C．the patients can be treated |
| D．treated can be the patients |
The government has _______ the parents to work with teachers in the education of their children.
| A．asked for | B．called for | C．looked for | D．paid for |
The plan ______ just because people were unwilling to co-operate.
| A．broke down | B．pulled down | C．turned down | D．put down |
My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment.
| A．taken off | B．taken down | C．taken up | D．taken away |
Elephants would ______ if men were allowed to shoot as many as they wished.
| A．die down | B．die out | C．die away | D．die off |
I had to ______ because someone else wanted to use the phone.
| A．give up | B．put up | C．hang up | D．ring up |