Nowadays people sometimes separate their waste to make it easier for it ________.
| A．reusing | B．reused |
| C．reuses | D．to be reused |
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 |
The half smile on the little hero’s face seemed to suggest that he was happy __ his life for his country.
| A．to give | B．giving | C．given | D．to have given |
He forgot to turn off the light.So he went to bed with the light ___on.\
| A．to turn | B．turned | C．turning | D．turn |
Asia is the largest continent, ___ one third of the earth’s land area.
| A．to cover | B．cover | C．covering | D．covered |