They ______ the _______ snake by using a special kind of powder.
| A．poisoned; poisoned | B．poisoned; poisonous |
| C．poisonous; poisoned | D．poisonous; poison |
I’ m tired out. I ______ all afternoon and I don’t seem to have finished anything.
| A．shopped |
| B．have shopped |
| C．had shopped |
| D．have been shopping |
Carol said the work would be done by Octorber, ____ personally I doubt very much.
| A．it |
| B．that |
| C．when |
| D．which |
____ one can achieve largely depend on ____ hard he works every day.
| A．What; how | B．That; how | C．What why | D．That; why |
—How did you like Nick’s performance last night?
—To be honest, his singing didn’t ____ to me much
| A．appeal |
| B．belong |
| C．refer |
| D．occur |
Each button, when ____, provides a piece of beautiful music.
| A．clicked |
| B．having clicked |
| C．clicking |
| D．being clicked |