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 |
.
Allow children the space to express their opinions ________ they are different from your own.
| A．until | B．even if | C．unless | D．before |
.
Thousands of athletes______ in many countries will compete _______ medals in the 2008 Olympic Games in Beijing.
| A．involved; in | B．involving; by |
| C．to involve; against | D．involved; for |
.
Would you like to ______ us? We are going to _____ the school’s 20th anniversary celebration.
| A．join in; take part in | B．join in; join |
| C．take part in; join | D．join; take part in |
.
The audience was _____ very young children so there was a lot of noise while the concert was going on.
| A．consisted in | B．made up for | C．consisted of | D．made up of |
.
The lion is considered the king of the forest , for it is a(n)________ of courage and power.
| A．example | B．sign | C．mark | D．symbol |