around the fire, the tourists danced with the local people.
| A．Gather | B．To gather |
| C．Gathering | D．To be gathering |
30． the people have become masters of their own country that science can really serve the people.
| A．Only then | B．It is only when | C．Only when | D．It is only then |
29．--- How about the book you are reading?
--- Good indeed. It many problems we have come across in our study.
| A．says | B．talks | C．covers | D．refers |
28． a room in the hotel, Mr. Wood went out for a walk around the small town.
| A．Taking | B．Taken | C．To take | D．Having taken |
27．Sales of CDs have greatly increased since the early 1990s, when people to enjoy the advantages of this new technology.
| A．begin | B．began | C．have begun | D．had begun |
26．I accept that he is not perfect, I do actually like the person.
| A．while | B．since | C．before | D．unless |