We should all remember that some great scientific discoveries _____________ by chance.
| A．gained | B．discovered | C．occurred | D．earned |
We can no longer to consider water an almost free resource that we can use as much as we like.
| A．permit | B．afford | C．expect | D．offer |
Having retired from business, he now himself with the welfare of the disabled.
| A．associated | B．occupies | C．charges | D．rewards |
--- How do you like working here?
---- . To be honest, I miss my former colleagues.
| A．Not so good | B．More than satisfactory |
| C．I like it here | D．Very much |
Almost all the English texts in this school are from the British textbooks.
| A．advanced | B．adjusted | C．adopted | D．adapted |
A good storyteller must be able to hold his listeners’ curiosity he reaches the end of the story.
| A．when | B．unless | C．after | D．until |