In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.
| A．give in | B．give off |
| C．give away | D．give up |
The student has the _______ for acting, but she needs training if she wants to be a top actress.
| A．document | B．potential | C．equipment | D．presentation |
We should try to do as many _______ things for the environment as we can.
| A．adaptable | B．beneficial | C．appealing | D．accessible |
He is said _______ for the International Criminal Police Organization for many years.
| A．to working | B．to work | C．to have worked | D．working |
He was sent to Australia _______ when he was ten years old.
| A．to be educated | B．to educate | C．educating | D．to be educating |
Though he had tried to swim across the English Channel, he didn’t _______.
| A．get it | B．make it | C．arrive it | D．do it |