—Alice, you feed the bird today，________？
—But I fed it yesterday.
| A．do you |
| B．will you |
| C．didn't you |
| D．don't you |
Before __ the trunk must be checked.
| A．used | B．to use | C．being used | D．to be used |
The young Swede was made ___ a lot of practice before the Napoleon’s inspection.
| A．have | B．had | C．having | D．to have |
Everybody knows that we should not drink ___ water, or they will get burnt.
| A．boil | B．boiled | C．boiling | D．being boiled |
William Tell hesitated to let his boy risk __ there with an apple on his head.
| A．standing | B．stood | C．to stand | D．to be standing |
Crusoe found that nine savages seemed to be eating something which they ___ on the fire.
| A．have cooked | B．had cooked | C．to have cooked | D．being cooked |