John promised his doctor he _____ not smoke and he has never smoked ever since.
| A．might | B．should | C．could | D．would |
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 |
After many months of hard work, they manager __ off all the debts.
| A．to pay | B．paying | C．paid | D．paying |
Mike is taller than __ students in the class.
| A．any | B．any other | C．all | D．everyone |