24. ______is known to all, the Amber Room belongs to the Russians.
| A．As | B．Which | C．That | D．What |
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 |
I don’t know why he has been absent _______ class for so long.
| A．in | B．for | C．with | D．from |