Even if there is no scientific proof secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.
| A．which | B．that | C．when | D．where |
Students in English-speaking countries usually address their man teacher ‘sir”, but __________ their woman teacher “madam”.
| A．seldom they address | B．do they seldom address |
| C．seldom do they address | D．they seldom do address |
I am _______ about what I say because careless remarks are likely to hurt others’ feelings.
| A．absurd | B．concerned | C．guilty | D．cautious |
They discussed the issue of the world’s climate in Durban, South Africa several times but could come to no ________.
| A．end | B．conclusion | C．result | D．judgment |
----Matthew said that he was very _______. How about Jack?
----He was satisfied with Matthew’s _______, and wanted the unpleasant business over.
| A．frightened; suggestion | B．sorry; offer |
| C．sorry; apology | D．pleased; request |
In the job interviews applicants often find themselves ______ unexpected questions, some very difficult to answer.
| A．asked | B．asking | C．to be asked | D．to ask |