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 |
“Have great changes taken place in your village?” “Yes, A new school was ______ in the village last year.”
| A．held up | B．set up | C．sent up | D．brought up |