18. It is ______ that he has passed the examination, and I am _____ I will pass it too.
| A．certain; certain | B．certain; sure |
| C．sure; certainly | D．certainly; surely |
The reason______ he gave for being absent from school was ______ he had to attend his sick mother at home.
| A．which; because | B．why; because | C．不填; that | D．why; that |
Little Tom hid himself in the place_______ couldn’t be found, _______make her mother annoyed.
| A．that; that | B．that; which | C．where; which | D．which; what |
The river______ surface used to be covered with waste and rubbish is now taking on a new look.
| A．of which | B．along with | C．where | D．whose |
We have a slight problem with the temperature control but_______ everything’s fine.
| A．somewhat | B．anyhow | C．especially | D．otherwise |
They got two free tickets to Canada, otherwise they______ able to afford to go.
| A．wouldn’t have been | B．mustn’t have been | C．wouldn’t be | D．hadn’t been |