As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
| A．exactly | B．finally | C．gradually | D．frequently |
He is my father, _____ a better father does not exist.
| A．but | B．than whom |
| C．than who | D．against whom |
_____ is known to us all is that America is a developed country _____ the First World.
| A．Which; belonged to | B．As; belonged to |
| C．What; belonging to | D．It, belonging to |
The mountain-climbing ___ every one of us.
| A．has been tried | B．has tired | C．is tired | D．tired |
I do think my house wants ____.
| A．to be painted | B．to paint | C．to be painting | D．to have painted |
The school required ____.
| A．rebuilding | B．to be re uilt | C．to have rebuilt | D．rebuilt |