The island where these rare birds nest has been declared a _____.
| A．observation | B．reservation | C．preservation | D．conservation |
Have you ever dreamed of playing in front of thousands of people at a concert, _______everyone is clapping and appreciating your music?
| A．in which | B．for which | C．from which | D．at which |
Sometimes they may play to passers-by in the street or subway so that they can earn some______ money for themselves or to pay for their instruments.
| A．certain | B．extra | C．various | D．unusual |
The band about 1970, but happily they reunited in the mid1980s.
| A．broke up | B．broke down | C．broke out | D．broke in |
As a result these endangered animals may even .
| A．die away | B．die down | C．die out | D．die off |