Put yourself in situations where you will be forced to communicate in English, ____ you will see more progress over time．
| A．or | B．so | C．yet | D．and |
It was announced that only when the fire was under control ____ to return to their homes.
| A．the residents would be permitted | B．had the residents been permitted |
| C．the residents had been permitted | D．would the residents be permitted |
The next morning I’d just about given myself up for lost _______ I was spotted by a ship.
| A．as | B．after | C．when | D．while |
------ The authors of computer viruses are geniuses.
------ I agree. They can apply their wisdom to other net technology ________ human beings can benefit.
| A．in which | B．through which | C．on which | D．from which |
I’m lucky _______ the thing I enjoy doing more is ________ I’ve ended up doing.
| A．what; what | B．what; that | C．that; what | D．that; that |
The construction of the two new railway lines ________ by now.
| A．have been completed | B．has been completed |
| C．has completed | D．have completed |